Now for something different. In 2004, Animal Planet showed as new series
called Animal Face Off, a series reconstructing conflicts between coexisting
animals. While the execution was clumsy and lacking, the concept is strong and
I think easily applied to prehistoric fauna. Ideally, there would be
professionals discussing the situations, but unfortunately, you have only me.
First I will compare the animals, and then depict their behavior, before
concluding with the final battle. The outcome will be my personal
opinion; and there would be many times when the outcome would be decidedly
different. This is not a scientific consensus, but one researcher’s opinion.
We all love dinosaur battles. They’re always a high point in a film. It’s childish, but it’s just plain fun. So, I’m hoping to use this opportunity to use this almost-universal appeal to get people thinking and talking about ecology, biomechanics, and behavior. Only one or two of these stories will be based on actual fossils-the rest are likely possibilities that must have happened sometime or another. In real life, animals usually don’t fight on even terms, but it does happen. Sometimes prey turn the tables, sometimes predators quarrel between themselves, but it can happen. I hope you enjoy this. Again, first I will have two scenes, one for each animal showing them in their habitat and showcasing their particular skills, then finally concluding with a battle between the two.
I MUST WARN THAT THIS WILL BE VIOLENT. IF YOU HAVE A PARTICULARLY VIVID IMAGINATION, OR HAVE AN AVERSION TO GRAPHIC NATURALISTIC VIOLENCE, I STRONGLY SUGGEST NOT CLICKING ON THE CUT
We all love dinosaur battles. They’re always a high point in a film. It’s childish, but it’s just plain fun. So, I’m hoping to use this opportunity to use this almost-universal appeal to get people thinking and talking about ecology, biomechanics, and behavior. Only one or two of these stories will be based on actual fossils-the rest are likely possibilities that must have happened sometime or another. In real life, animals usually don’t fight on even terms, but it does happen. Sometimes prey turn the tables, sometimes predators quarrel between themselves, but it can happen. I hope you enjoy this. Again, first I will have two scenes, one for each animal showing them in their habitat and showcasing their particular skills, then finally concluding with a battle between the two.
I MUST WARN THAT THIS WILL BE VIOLENT. IF YOU HAVE A PARTICULARLY VIVID IMAGINATION, OR HAVE AN AVERSION TO GRAPHIC NATURALISTIC VIOLENCE, I STRONGLY SUGGEST NOT CLICKING ON THE CUT
The last time on this feature, we saw the emergence of a
new, large predator and its reign over the American West. It’s been 37 million years since then, and
that’s a long time in terms of even evolution. To put it this way, 37 million
years ago, elephants were the size of ponies, horses the size of Labradors, and our ancestors were similar to langurs or
colobus monkeys. In this time, an
evolutionary arms race has continued and intensified. Dilophosaurus was made
obsolete by bigger, stronger, more intelligence predators. Sarahsaurus has been
dwarfed by its successors, who grow in response to bigger, better defended
plants and the aforementioned predators.
Dinosaurs have become spectacular.
This is the Morrison formation, 155 million years ago. It’s
warm and seasonal , as before, but the similarities end there. Lakes have given
way to vast rivers and a sea in Alberta
intruding from the north, huge evergreen forests with 60-foot trees come and
go, and between the rivers are great plains. This is before grass, so the main
plains plants are cycads and ferns, with rushes and horsetails along the
riverbanks.
Right now, it’s the beginning of the wet season in what is
today Colorado, on a flat plain where the Rockies will rise. Great rivers flow through it, and the
recent rains is making them swell again. With the rains come the greenery, and
that brings the herds. Already a herd of
Diplodocus is here, their long necks allowing them to both rake the leaves off
the giant pines or practically vacuum cycad and fern fronds. The secondary forest has already suffered
greatly from the herds, but it still stands strong, allowing for other forests
to regenerate from previous defoliation.
The diplodocus hooting is joined by another, different
bellow. Another sauropod herd, this one
of Camarasaurs, has joined to feed on the new growth. They are followed by
swarms of ornithopods-ranging from the large, advanced Camptosaurus to the
medium-sized racer Dryosaurus, to the tiny Othnielosaurus. They feed on both
the plain and the forest, and as the Camarasaurs continue their slow and
stately march, the ornithopods spread out to feed. Only a few will follow the
Camarasaurs to their destination to feed on whatever scraps fall from their
chomping jaws.
The next day, another, smaller herd arrives. It’s a mixed
group of Barosaurus and Brachiosaurus, two very different, very rare sauropods.
In Portugal, Dinheirosaurus
and Lusotitan form similar groups, and
in Tanzania
their sister species Torneria and Giraffatitan act the same way. The
heavy-necked Barosaurs don’t have the same flexibility in their neck as their
relatives Apatosaurus and Diplodocus, so unless they rear on their hind legs,
they typically browse lower growth. Meanwhile, Brachiosaurus can stretch their necks
35 feet over the ground to chop up the highest leaves.
Later that week, a herd of Stegosaurs join the feast. They
are low-browsers, eating younger trees
by the edges of the forest or
grazing in the plains between the forest and the river. They’re ready to
mate, judging by the pink flushes on their maroon plates. High-plated bulls and long-legged cows flash
their plates, in a visual equivalent of a bird chorus.
The forest thins in some places-sometimes it’s the younger
sections outgrowing from the main group, or the older groves that have barely
survived the relentless munching. This is ideal for the Camptosaurus and
Stegosaurus as they can rear up to eat the saplings or simply plod along
cropping the cycads and ferns.
It’s also more dangerous.
The denser forest is too dense for large predators to hide, and the
plains provide no cover, so this medium growth allows for ideal stalking
cover. The most successful predator of
the past 5 million years will exist for another 5, and continue a worldwide legacy. This is Allosaurus. Specifically, a 30-foot
female at the beginning of maturity. She’s had enough experience to know how to
hunt large prey, but is still agile and energetic. Allosaur minds are
demanding-they’re not quite bright enough to play, but they still require
stimulation. If she can kill a large prey, she might attract a mate. Likewise,
she can simply wait for the smell of carrion, which can mean a male is hunting
nearby. Either way, she puts her nose in the air. The mixed scents of the forest
reveal many small animals, but they would be only prey for Ornitholestes or its
more primitive cousin Coelurus. She’s eaten them in turn, but they’re hard to catch and
they’re only a mouthful.
More promising scents waft over. Sauropods…she’s killed some
youngsters before, but has had enough times where the adults chased her off.
Right now she can’t smell any subadults that aren’t mixed in with the adults.
They might segregate as more herds join in, but it doesn’t look like she can
pick off any today.
The wind shifts, and so does she. She’s spooked prey on
accident when the wind changes, so when she can’t smell them anymore she walks
around until she can again. This time she smells much nearer prey.
Stegosaurus-they have younglings too, but they’re dangerous. Sometimes adults
can be taken late in the season when illnesses begin to take their toll and
when Allosaurs hunt in mated pairs.
She pivots her head to peer towards the direction of the
scent. Stereoscopic vision is not found on large theropods as of yet-instead
they have large obstructing horns and crests above or behind their eyes to
attract mates. Her horns are soft
blue-those of a male would be bright red.
She can make out the familiar colors of her prey. The brown-green bodies
tipped with maroon, red, and pink are the Stegosaurs, but among them are the
black forms of Camptosaurus, with bright red markings on their heads and tails
and white stripes on their backs.
Camptosaurus are interesting prey-they’re common due to
their very efficient teeth and jaws allowing them to eat more and faster.
They’re fast-not as fast as smaller dinosaurs but as fast as any adult
Allosaur. They have no weapons against larger predators other than their speed
and maneuverability, but it’s enough. More problematically for Allosaurus, they
tend to herd with Stegosaurus, which are much slower but very well defended.
She’s seen other Allosaurs with large, infected puncture wounds-she doesn’t
know how the wounds were delivered, but the large tail spines speak for
themselves. She’s been lucky-all of her scars are from falls or from fighting
other predators.
She’s hungry, but she’s patient. She’s going to wait for an
opportunity to present itself. As long as the wind doesn’t shift again, she
will stand there behind the cover of trees to peer at the herd. A hyperactive
mammal mind would get bored, while a primitive crocodile mind would simply stay
at the spot for days. She can wait a few hours, but hopefully she won’t have
to.
Her luck kicks in-she sees movement. A Camptosaur cockerel
has wandered off from his harem of pullets to browse on new greens. His jaws
made short work of the spiny, tough cycad leaves and he peeks in to get at the
juicy seeds. His beak slices through the leaves and cracks the husk to get at
the soft fiber underneath full of oil and sugar.
Cycads have been fighting a battle against
herbivores-they’ve grown tough bark to deter Permian herbivores, grown higher
to foil dicynodont tusks and beaks, and armored their seeds against sauropods
and their ancestors. However, a combination of dinosaur size and an
increasingly more powerful beak have rendered their defenses obsolete. Poison
and sharp fronds will develop in turn, but armored heads and necks and more
sophisticated stomachs will defuse those in turn.
Camptosaurus is equipped to deal with this era’s cycads, but
the tall thick fronds hamper his vision even with his strong short forelimbs
shove them aside and his wide set eyes give a very wide scope. This is the moment Allosaurus has been
waiting for, and she makes her move.
Allosaurus are not that stealthy, and she crashes through
the growth in her charge. The noise alerts the herd, and most of them pause and
look away from their food. Her foot splinters fallen branches, and that gets
the skittish Dryosaurs racing away. The Camptosaurs scatter. The Stegosaurus
fan out.
It’s too late for the target bull, however. He’s fast enough
to have avoided many allosaur and ceratosaur attacks in his lifetime, but his
moment of distraction has caught him off-guard. He has to rear up to push away
the fronds of the cycads, and only then does he see and smell his attacker. His
mind switches from feeding to alarm to flight and he turns to run. He’s got good acceleration in open country
and has outpaced many allosaurs with his stamina, but he first needs to clear
the foliage.
No sooner than he breaks into the clear than Allosaurus is
on him. She’s got the running start, and while her stamina is limited compared
to Camptosaurs, it’s enough to get the job done. It’s then when his luck runs out. During this whole affray, a smaller armored
dinosaur has been grazing nearby. He’s a Gargoyleosaurus, the first in a long
line that will succeed the Stegosaurs and foil the Allosaurs. He’s only the
size of a pygmy hippo, but his head and body are armored with bone plates and
spines. He’s even slower than Stegosaurus and has no weapon to counterattack,
but he’s too small and heavily armored for any predator to consider him with
the tackle. At worst they break their teeth and scar their faces. At best they
only have enough food for a day. While
meatier than Dryosaurus, ankylosaurs are even less worth it.
Right now, though, Gargoyelosaurus is about to help out
Allosaurus. The panicked Camptosaurus doesn’t pay attention where he’s running,
and he crashes past a cycad and right into Gargoyelosaurus. Both tumble.
Gargoyleosaurus rolls over, but is light enough to keep rolling until he lands
feet first rather than landing on his back and becoming entirely helpless.
Camptosaurus flips over, crushing ferns as he goes. He’s on his feet, but it’s
too late.
Disoriented, rears up and swings his head around to see
where the predator is. From a stooping
run, Allosaurus opens her mouth as she runs in alongside.
Allosaurus’ skull is light but sturdy. It’s like a box made
of metal pipes making up the lines and cardboard between them. Against other
allosaurs, she rams them with her horns. Against prey, she goes in for the kill
with her open mouth. Her mouth gapes
wide open to expose her broad, curved, serrated teeth. They’re not as sturdy as
a Tyrannosaurus’ teeth-they’re not bone-crunching. Instead, they are like a
saber-at high speed they slash at prey with the sharp blade and long cutting
surface, slicing through skin and muscle.
Her head is light enough not to slow her down as she charges, allowing
her to catch up with her prey, but sturdy enough to withstand the violent
collision. As she hits, she opens her
arms so that her strong, curved talons can pierce into the prey. Her left claw
hooks into the side of Camptosaurus as her teeth shred the flesh behind his
shoulder. In a second he’s down again.
He slams down on his side in shock from the combination of
the blood loss and her powerful swipe. Allosaurus nearly skids past him,
slipping on his blood, but she manages to stop with a powerful stroke of her
foot. They’re parallel to each other. Camptosaurus looks up to the left to see
his assailant, his legs and tail flailing in panic and pain. Their eyes meet-his bulging in terror and
confusion, hers dilated in as adrenaline propels her killing. Now she bites into his neck. Her bite is
relatively weak compared to later predators, but she’s not breaking his neck,
but cutting it up. Arteries, veins, and windpipe are severed as she closes her
sawing teeth on him and gives it a short, strong shake with her powerful
neck. Terror and agony end for
Camptosaurus.
There’s many other Allosaurs in the area as the herds
migrate to these lush pastures, and the riverside has its own dangerous
predators, so she eats fast before the scent can reach her rivals. With
powerful tugs of her neck and slashing bites of her jaws she carves him into
chunks, her talons manipulating the 2- ton corpse so to eat more efficiently.
She is the apex predator of the Jurassic-no other is as powerful, versatile or
efficient. She will mate soon and bear
many children before she passes from food poisoning from rotten meat.
As the Allosaurus feeds, a herd of Stegosaurs makes their
way to the river. Their huge size means spreading out into small groups or
individuals to find food, and it takes a lot of foliage to power five tons of
muscle. The lush horsetail forests by the rivers provide a banquet, and they
eagerly tuck into the short plants. Longer shoots are shoved over by their
shoulders and elbows to bring them down to mouth level. The crocodiles resting nearby shuffle into
the water, no match for the giant herbivores and reluctant to become trampled.
Crocodiles, however,
are not the only predators here. There are two theropods here. Allosaurus rules
the plains, but the lowlands and rivers belong to two different, specialized
theropods. One is the rare giant
Torvosaurus and the more common but still second-rate Ceratosaurus. Ceratosaurus are smaller, lighter predators,
but still dangerous. Their maxillary teeth (the top row) are bigger than
Allosaurus’ and the Ceratosaurus aren’t picky.
They lurk in tall horsetails and rushes for dinosaurs to go towards the
water. If they’re really hungry, they will snack on the crocodiles and fish,
pursuing them into the water. Allosaurus don’t hunt near the river in the wet
season-the lighter Ceratosaurus are more maneuverable and run circles around
them, and in the flooded rivers the smaller theropod can turn the tables.
They also hunt in pairs. Sometimes it’s a parent and their
offspring, but most often they’re mates. Right now, one mated pair is watching
the river. A Camarasaur carcass once washed downstream to their beach once and
provided them with food for weeks. Last
week they caught not only an unwary dryosaur that tripped in the mud but also a
wounded Allosaur that had been mauled by a rival. They’re not smart enough to
be picky and dangerous enough to afford that kind of generalization.
The Stegosaurs provide an interesting challenge. They’ve tasted
Stegosaur before. The male once scavenged a carcass with his previous mate, and
the female once was lucky enough to kill a juvenile. They know their food, and
Stegosaurus are food. Cooperative hunting has just evolved-the most
sophisticated they can get is to flank the prey as they attack. The duo won’t last
too long-they mated just a week ago and soon they’ll depart to find other
mates, chowing on fish in the meantime.
Right now, they intend to eat something big. Two Stegosaurus bulls are rubbing shoulders
eating the same clump of horsetails, and quickly antagonizing each other in
their hormonal stage. They flash their plates at each other, shouldering each other with their powerful
upper arms. They neck wrestle, hormones finally kicking into gear. The rest of the herd spreads out, avoiding
the fracas. This is the opening the Ceratosaurs have hoped for.
One of the Stegosaurs, a gigantic cow, is the
outermost. An ideal prey would be her
calf, but said calf is on the far side and dangerously close to two more adult
stegosaurs. Usually they wouldn’t do
this. Usually they’d be patient. But this time their patience has run out. More sophisticated theropods like birds can
wait it out, like the birds perched nearby the scene. Ceratosaurus, however, is an older design,
one evolved for overpowering prey. It’s in this unique habitat and hunting
style that Ceratosaurus is still competitive. They won’t dare venture too far
in an Allosaur territory alone, or tackle a Stegosaur alone, but they see each
other and smell each other, and that gives them courage.
The Ceratosaurus charge in-they have no strategy as it hasn’t
been evolved yet. The killing tactic is brutal, bloody, and simple-charge in
and use their open mouths like machetes. The stegosaur barely has time to react
when the Ceratosaurs hit. Fortunately
for her, she doesn’t have to. The broad,
razor-sharp teeth slash at her hide, but it’s not a killing blow. Her sides are peppered with tubercles and
small bumpy scales, evolved to deal with flesh-rending teeth like those of
Ceratosaurus. She’s in pain, though, and she lets out a loud bellow that alerts
the rest of the stegosaurs.
They scatter as she pushes off with her right feet, turning
90 degrees and swinging her powerful tail. One ceratosaur, a red-horned male
gets slammed by her 5-ton body and send tumbling into the river. The
black-horned female scrambles backwards, nimbly avoiding the deadly tail not
once but twice. She roars and snaps her
jaws in frustration. The Stegosaurus
walks to firmer ground where she can move easier and take away the Ceratosaurs’
advantage, but that allows for the male predator to right himself.
The Stegosaurus moves inland, trying to keep her attackers
on the same side, but they manage to flank her, even by accident. She swings her tail-the deadly spines miss,
but the muscular tail swats both of them and force them back.
The physique of Stegosaurus is remarkable. The short
forelimbs give her a low center of mass based on the thorax, not the hips. The
femurs and humeri are much longer than the other limb bones, making the hips
and shoulders the pivot point. This makes her able to quickly turn her
forequarters or hindquarters or even both.
The tail bones are almost all the same size, supporting long powerful
tail muscles and giving it a lot of flexibility. The spines on the vertebra
closer to the pelvis are very tall for huge muscle attachments and augmented
with prominent transverse processes to attach more muscle, giving the tail even
more power.
She digs in her forelimbs and strides sideways with her
hindlimbs, then curls her tail inwards and then back out to swipe again. Both
Ceratosaurus jump back again, their agility keeping them from harm. They step forward together, but another flick
of that deadly tail drives them back again.
The standoff ensues. The Jurassic dinosaurs, however, lack the stamina
of their more sophisticated successors.
The Ceratosaurus must brave the defenses and charge once more, or flee
one last time.
The duo chooses the former. Both charge at the same time,
hoping to use their combined strength and weight to knock down the Stegosaurus
and tear her apart. She does not cooperate; Stegosaurus, having secured her
hindquarters, pushes off with her front feet and swiftly changes her position
in a 90 degree rotation. The last thing
the male Ceratosaur sees is the tail spines coming at the right side of his
face. One spike pieces into bone right
in front of the anteorbital (gaps in the skull to make it light, in front of
the eyes) fenestrae in a nonlethal but extremely painful blow, the other bone war pick ends the pain
instantly by entering the postorbital fenestrae, stabbing through the jaw
muscle and into the brain case.
An equally powerful backswing not only pulls the spines out
of the male’s skull but drives the opposite set of spikes into the abdomen of
its mate. No matter what species, a
penetrating stab wound to the abdomen is horrific even if it’s not fatal. In
this case, it impales 3 feet deep into the intestines. She goes into shock and falls alongside her
mate. If she doesn’t bleed out, she will almost certainly die of septic
infection. Most likely she will die next to her mate, food for the scavengers.
Stegosaurus doesn’t care about their fate. She is safe, her
offspring is safe, and her wounds will avoid infection with a little luck. The
hormones cease, her heartbeat slows, and her body goes back into its neutral
position. Alarm turns to hunger, and she returns to the horsetails with the
rest of her reassembling herd. She has
survived predators before, and will instead die of a stomach parasite.
A generation passes. Forests rise and fall, expand and
shrink. The herds come and go, along with their predators. The descendants of
Allosaurus and Stegosaurus die or grow to maturity. Eventually, they will meet.
The precipitating circumstance is a drought. The normal
rhythm of wet and dry is sometimes disrupted by the fickleness of weather. In this case, the dry season goes for too
long. Without the rains, the forest and
plain shrink and the river dries up. The
Ceratosaurs, crocodiles, and Torvosaurs are the first to move upstream, with
the herds of herbivores following them as the greenery dies. In times of abundance, the herbivores spread
out and thrive, but in this lean time they form vast caravans that stretch for
miles on end.
One herd is the Stegosaurs. Among them are the three
surviving offspring of the Stegosaurus we met earlier-a pair of males from the
same clutch and their older sister. They
each have offspring, carefully herded in the middle away from harm. Their
smells are familiar to each other, and so they stick together for comfort.
Friendship takes advanced cognitive functions, but they know they’re related,
and their herding instinct does the rest. They cannot suckle their offspring
like mammals, so all they can do for the starving infants is to stay between
them and whatever predators come.
They coast on their momentum, following the smells of green
and water, growing stronger and stronger. They must be a few miles away. Then the
wind shifts, the scent being replaced by another menacing presence and the
agonizing bellow of a herbivore. The
Stegosaurs hustle, walking as fast as their stocky bodies can allow. Some look
back and discover the source of the alarm.
Behind them is a Diplodocus, half-blind and lost from her
herd. She is beset by a gang of Allosaurs. Allosaurus usually only stand each
other’s company during the mating season as pairs, but as their prey form herds
and leave a train of the dead and dying, the predators congregate on the rich
pickings, In this case, a nearby Diplodocus herd is being tailed by the
Allosaurs, and the wandering senior citizen makes for a tempting target.
She stumbles about, but her moments are few. Every time she
takes a swipe of her neck or tail to fend off an attacker, another rips of
piece of lean flesh off her. She’d be a better find if she was well-fed, but
the Allosaurs will take what they can find, and her full adult size still
provides plenty of meat. Later group hunters like mobs of dromeosaurs and
creodonts or sophisticated hunting parties of dogs and cats and primates will
turn this harrying into an art, but even this crude feeding frenzy will do the
trick. Diplodocus manages to slash
several attackers with her whip tail and even crushes one with her front feet,
but her bleeding, mauled legs finally give out, and she is quickly devoured.
The Allosaurs butcher the fallen giant with great bites of
their jaws, and those left out turn to their crushed comrade to devour him as
well. There is still one hungry Allosaurus, though. This is eldest daughter of
the Allosaurus we met, and she’s used to getting her way. There’s just too many
rivals to have her fill and too much blood in the air to calm down. She can smell the food and see the corpses,
but she is left out. The scent of blood and dead sauropod mingles with a new
one. Yes, it’s Stegosaurus. She’s had some. Early in the drought she scavenged
an old bull and she’s found that the calves are delicious if they can be picked
off safely. They’re food.
She pivots her head-sure enough, she can make out the shapes
of stegosaur juveniles, ranging to half-sized subadults to tiny infants hatched
late but still strong enough to make the journey. The herd is moving slow, but
has just sped up. Allosaurus isn’t as fast as she could be, either, but she can
outpace a Stegosaurus even on a bad day like today. She follows her nose and
makes a beeline for the herd.
The problem with a Stegosaurus herd is the twitching tails.
It’s an instinct to menace predators and it kicks in when the alarm signals go
off in the brain, but right now it’s making it difficult for them to keep a
tight formation. As they spread out, it
gives Allosaurus her chance. Now she can slip in among them to take a juvenile.
She’s done this plenty of times. She might not have the eyes of an eagle or
nose of a dog, but her senses are keen and trained through years of experience
and millions of years of evolutionary specialization.
There’s a small juvenile by one of the twins. She goes for it.
The chase is slowed by hunger, but desperation adds its own speed. She’s
blocked off from a rear approach by the older sister Stegosaurus, but
Allosaurus tries to run around the male
from the front. He’s faster than he looks, though, and blocks her path.
A diving lunge of her powerful jaws misses. Frustrated, she bites onto his neck
as they race. This would kill a Camptosaur. This would stop even a giant
sauropod in its tracks. But it does nothing against Stegosaurus, who wrenches
himself free and shoulder-checks his attacker.
Stegosaurus has what is called a Pixane in proper armory
terminology-a mailed neck guard covering throat and collar. She didn’t hit him
with enough force to pierce the bones. She’s not a Tyrannosaurus-Allosaurs eat
prey defended by flesh, not bone.
Allosaurus turns to
attack another juvenile, but she’s not quick enough-the little one rises to his
hind feet and runs in a short burst. Only juveniles can do this-sometimes
adults can stand as tripods but their mobility is limited. She bites nothing but dust.
She turns again to
the brother that checked her. This time she tries to bring him to the
ground-her talons sink into his shoulder and bites into a neck plate to pull
him to the ground. The thin plate bleeds
profusely as she sinks her teeth into it. Allosaurus bites with all her power
and pulls with her sturdy, powerful neck. He’s starting to stumble and lean to
his side, struggling to keep on his feet.
Something must give way- her teeth, his plate, or his balance.
It’s the plate- there’s a sickening crunch as she bites away
the plate. It’s nothing but thin bone,
and not worth gnawing, so she coughs the bone out of her mouth,
frustrated. She’s drawn blood, though,
and she’s not discouraged. If she can get a lucky bite, or leap onto his side, she can kill him.
It’ll take a trick, and sometimes it doesn’t work but it’s her best chance to
bring him down.
Then a collision interrupts the battle. The older sister
Stegosaur has through a combination of accident and protectiveness rammed into
the Allosaurus. The two crash into the dust on their stomachs, as the herd
moves past them. It’s not an easy picking anymore. It’s not a chase anymore.
It’s a duel to the death.
They slowly circle each other, the Allosaurus roaring in
frustration, Stegosaurus bellowing back and flashing her plates as a
menace. Losing focus and in a furious combination of rage and hunger, Allosaurus lunges, aiming bites
at Stegosaurus’ neck and head. Stegosaurus ducks and dodges, and when
Allosaurus finally bites down, her neck armor thwarts the theropod and breaks
off teeth.
Curved into a defensive posture-perpendicular to the enemy,
with head and tail both turned to face the attack, Stegosaurus walks slowly
backward. A few feints from Allosaurus
fail to do anything but move the Stegosaurus back. A flanking attempt only
provokes Stegosaurus to move with Allosaurus. They’re matched in
maneuverability. The rest of the herd is
forgotten. It’s no longer a chase, it’s a duel. Allosaurus feints, Stegosaurus
swipes.
The standoff leads to a pause, both panting in exhaustion.
Stegosaurus changes position-she turns around to walk back to the herd. Allosaurus seizes the opportunity. Even as
she opens her jaws to inflict a mortal blow to Stegosaurus’ flanks, Stegosaurus
swings her deadly tail. Before Allosaurus can sink her teeth into Stegosaurus,
the spikes hit. It’s not a lateral blow-she twists her powerful tail muscles to
angle the spikes and the tail swipe upwards. If Allosaurus was at a different
position, her thighs would be the target and she would be crippled. Instead,
the weapon stabs deep into her hips. One spike pierces her pubic bone, another
finds nothing but flesh and goes right through the lower intestines.
Allosaurus roars in pain as she crashes to the ground.
Stegosaurus turns her head to see the results of her tailwork. After seeing the
predator fallen, she turns back to the herd and walks off to rejoin it.
Hopefully she can make it in time before more predators appear. She doesn’t stay to finish off her nemesis-as
long as she’s in no immediate danger, she‘s going to rejoin her group. The search for food and water is far more
important than petty revenge.
Allosaurus slowly gets back on her feet. It’s over for her.
She could pursue, but the next blow could be pierce her neck or her chest.
She’s not going to take more chances. The pain is too great. She’s too tired,
too badly hurt, fighting off shock and bleeding badly. She’s not long for this world at any rate, although she doesn’t
know it. She’ll make one more kill and have a few more meals before she dies,
but within the next month, she’ll be dead. The horrible injuries will compound
on each other-fecal bacteria already is entering the blood steam and spreading
to the other wound. The remainder of her
life will be spent in agony-the bone has been torn, and instead of repairing
the bone will swell and abscess. She’s
already bred-her descendants will rule the next million years, but individually
she’s doomed
.
Perhaps the next generation will see another duel, or the
next. All that is certain is that Allosaurus and Stegosaurus will continue to
glare at each other across the millennia until both species are extinguished. Next time, we shall cross the channel and see
the descendants of Allosaurus and Camptosaurus as they enter the Cretaceous.
This comment has been removed by a blog administrator.
ReplyDeleteThis comment has been removed by a blog administrator.
ReplyDeleteThis comment has been removed by a blog administrator.
ReplyDeleteThis comment has been removed by a blog administrator.
ReplyDelete