Posts Tagged ‘Jaws’

The Hulking Crocodilians

Monday, March 26th, 2012


The crocodilians – the heavily armored crocodiles, alligators and gavials – are the largest of the modern reptiles and the last surviving reptilian descendants of the stock that also produced the dinosaurs. Although somewhat clumsy out of water, they are superbly equipped for living in it. They are strong swimmers, and experts at drifting along on the surface, submerged except for their bulging eyes and nostrils, their long flat jaws not even making a ripple in the water as they stalk turtles, swimming birds and fishes. The larger crocodiles can sometimes get close enough to animals on shore to sweep them – and humans – into deep water with their tails. Crocodilians have valves in their ears and nostrils to keep water out. Because their mouths lack lips and thus do not shut completely, two palatal flaps cover gullet and windpipe during dives.

 

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A Super Swallower

Tuesday, August 23rd, 2011


A sure way around the problem of subduing live flesh is to catch it young enough. The two-foot African snake Dasypeltis scaber, shown here, has carried this solution to the ultimate point of eating nothing but bird’s eggs, and has become marvelously specialized for this task. Its teeth have dwindled to nubbins which are useful only for gripping a smooth egg. Its jaws are loosely connected to its skull by two swiveling bones which can be dropped down to give Dasypeltis the most stretchy mouth of any snake. In its throat are sharp projections sticking down from the backbone and used to rip open eggshells.

 

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Back to the Sea

Friday, January 21st, 2011


After 70 million years of terrestrial life, some reptiles returned to the sea. One group, the sauropterygians shown on these pages, retained many reptilian characteristics, although their bodies became more streamlined. All the sauropterygians developed hard rib “baskets” to support their abdomens and protect their vulnerable undersides from attack.

Prominent among the sauropterygians was an important group called plesiosaurs. One of these was Kronosaurus, a fast-diving predator with huge, fish-trapping jaws. Another was Cryptocleidus, which used its long, flexible neck for plucking victims from passing schools of fish. Placodus, was not a plesiosaur; it was a leisurely bottom feeder that ground crustaceans to bits with its mouthful of flat, crushing platelike teeth.

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The Fierce Alligator

Friday, January 14th, 2011


Its respiratory system is better. The nostrils are separated from the mouth by a hard palate. When the alligator swallows a struggling victim there is no danger that a desperate kick will penetrate the roof of its mouth and damage its brain. The alligator has well-developed lungs in comparison to the more primitive saclike structure of snakes. It has the most highly developed brain of any reptile, and is one of the few to have its teeth firmly set in its jaws.

On the other hand, the alligator lacks a well-developed Jacobson’s organ, which means that its ability to detect tastes and odors is not nearly so acute as a snake’s. It has the well-developed digestive system which works so efficiently for all reptiles, but lacks a bladder, although most turtles and lizards have one. Its ammoniac kidney wastes, along with intestinal wastes, pass through a chamber called the cloaca which opens to the outside of the body.

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The Iguanas Motile Movements

Tuesday, August 25th, 2009


Movement of the lizard’s head with the dewlap fully extended. With its mouth half open, the Iguana emits a hissing sound that seems to originate from deep within its oral cavity. To convey yet further hostility the lizard moves its tail slowly back and forth, resembling the movement of a snake and suggesting the idea that it is about to strike out with this weaponry. Although lacking prehensile capabilities in its tail, the iguana is endowed with voluntary control over the movement of almost the entire length of its tail. This last threatening display can be more than mere show. An adult iguana can induce pain with a forceful snap of its tail. The iguana has many small

Teeth. When the iguana bites, it sometimes clamps its jaws shut and shakes its head back and forth, similar to a dog tugging on a towel when playing with its master. Judging from the fierce behavior that the irate iguana exhibits, it might seem that its proficiency in the art of self- defense would render it invulnerable to many predators. The truth, however, is that an iguana probably would be defeated in a conflict with any but the smallest of

Warm-blooded animals. An unusual and sometimes

Exasperating behavior that appears to be unrelated to the iguana’s display of aggression is this lizard’s ability to emit a spray of a salty liquid from its nostrils. This spray may be inadvertently directed onto the iguana keeper’s face when feeding or otherwise tending to the lizard.

In captivity the iguana is a territorial reptile. A male specimen does not allow intruders of the same sex within his boundaries. If two adult males are forced to co exist, one probably will become dominant and harass the passive lizard with frequent hissing and biting. An iguana defending its territory sometimes rams the trespasser with its snout and bites on impact.

It is reasonably safe to assume that a male and female of similar size can be kept as a pair without incident. The females of the species appear to be more passive, which suggests that two or more females might feasibly be housed safely within the same residence. Collectively housing as many as a dozen hatch-lings harmoniously is possible.

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The Animal’s Teeth

Friday, August 21st, 2009


The movement of the lizard’s head with the dewlap fully extended. With its mouth half open, the iguana emits a hissing sound that seems to originate from deep within its oral cavity. To convey yet further hostility the lizard moves its tail slowly back and forth, resembling the movement of a snake and suggesting the idea that it is about to strike out with this weaponry. Although lacking prehensile capabilities in its tail, the iguana is endowed with voluntary control over the movement of almost the entire length of its tail. This last threatening display can be more than mere show. An adult iguana can induce pain with a forceful snap of its tail.

The iguana has many small teeth. When the iguana bites, it sometimes clamps its jaws shut and shakes its head back and forth, similar to a dog tugging on a towel when playing with its master.

Judging from the fierce behavior that the irate iguana exhibits, it might seem that its proficiency in the art of self- defense would render it invulnerable to many predators. The truth, however, is that an iguana probably would be defeated in a conflict with any but the smallest of

Warm-blooded animals. An unusual and sometimes

Exasperating behavior that appears to be unrelated to the iguana’s display of aggression is this lizard’s ability to emit a spray of a salty liquid from its nostrils. This spray may be inadvertently directed onto the iguana keeper’s face when feeding or otherwise tending to the lizard.

In captivity the iguana is a territorial reptile. A male specimen not allow intruders of the same sex within his boundaries. If two adult males are forced to co exist, one probably will become dominant and harass the passive lizard with frequent hissing and biting. An iguana defending its territory sometimes rams the trespasser with its snout and bites on impact.

It is reasonably safe to assume that a male and female of similar size can be kept as a pair without incident. The females of the species appear to be more passive, which suggests that two or more females might feasibly be housed safely within the same residence. Collectively housing as many as a dozen hatch-lings harmoniously is possible, providing that the nest is not overcrowded.

Retained Eye Cap Advice. – Find Me A Reptile™ Reptile Forum. – i recently got a new royal male, who has approx 3 sheds worth of stuck eye caps, now normally i can soak the snake for an hour or 2, then with a.

Breeding Corn Snakes In Simple Terms.. – Find Me A Reptile … – found this on a site called “about snakes ” and thought it was ideal for here, its very simple, and easy to understand, i mean i was.

Soooo Excited!! – Find Me A Reptile™ Reptile Forum. – i sent justin ( Horndog ) the money today for my 3 het albino royals. got a male, and 2 females, and it will be my future breeding project! i have had.

NGM Blog Central – Theory Suggests Mesozoic Reptile Leaped Into … – Theory Suggests Mesozoic Reptile Leaped Into Air. Posted Aug 17,2009. CT-FOSSIL-dino-flight main. They were weirdly shaped weaklings, giraffe-tall hang gliders forced to hurl themselves off cliffs to get airborne. …

big lizard ideas – Find Me A Reptile™ Reptile Forum. – Hi all i have a 4ft long by 2ft deep 2ft high viv which i was looking to house a lizard but not too sure what to get ideally would like to get a.

Just arrived – RedTailBoas Ultimate Reptile Community – My 2 Coral Albinos just arrived.. Go here for the pics, http://www.redtailboas.com/forum/pic…t-me-dead.html as always I will post fresh ones when.

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