Uromastyx maliensis

Reptiles Alive Name: “Mali”

Hissstory: Mali was donated to us by former RA staff person Jennifer Rafter in 1999.

RA Diet: Greens, vegetables, and zoo herbivore lizard food.

Natural Diet: Greens, grasses, flowers, seeds, and occasional insects.

Range: Northern Africa

Habitat: Rocky deserts.

Size: Can grow to 15 – 17 inches.

Lifespan: 20+ years

Reproduction: Females lay about 15 eggs that will hatch in 60-70 days.

Conservation Issues: Captive breeding has proven difficult for this lizard, most uromastyx in the pet trade are wild caught.  Many people still capture this lizard for food throughout its range.

Cool Facts: These lizards sleep in their burrows with their spiny tails closest to the opening.  If a predator gets too close, the Uromastyx will whip its spiny tail in defense.

A reptile is a vertebrate animal, they have a bony skeleton just like you and me, breathe through lungs, are covered in scales, are ectothermic, and typically lay eggs.

Cold-blooded

Uromastyx basking in the sun

Reptiles are ectothermic (exothermic) meaning, “outside temperature.” This means the animal’s internal temperature changes with that of the environment. If it is 73 degrees outside, the inside of the snake is 73 degrees. Mammals are homothermic, meaning same temperature all the time. Humans are typically 98.6 degrees Fahrenheit all of the time.

Reptile bodies cannot function when it is too cold or too hot. They rely on their surroundings to maintain their body’s preferred temperature. A cold lizard will bask on a rock in the sun, then move to the shade after he becomes too hot.

Types of reptiles

There are over 8,000 kinds of reptiles split into four groups.

1. Chelonia – turtles, tortoises

2. Crocodilia – alligators, caimans, crocodiles, gavials

3. Rhynchocephalia – tuatara


4. Squamata – amphisbaenians, lizards, snakes

Scientists do not separate lizards and snakes into two groups, but list them under the group “squamata.” Snakes are considered specialized versions of lizards. Why must the scientists be confusing?

Compare and Contrast: Snakes Vs Lizards

All snakes are legless, but some lizards are legless too!

All snakes have no ears, but some lizards lack ears as well.

All snakes have no eyelids, but some lizards also have no eyelids.

Snakes have forked tongues, but so do many lizards.

Confused yet? Don’t worry, from now on we will discuss snakes and lizards as separate groups. Whew! (and you were worried)

Chelonians – Turtles

Inside a box turtle

There are over 300 different kinds of turtles. Sea turtles fly gracefully through the warm oceans of the world with giant flippers, tortoises lumber across the land with strong elephant like legs, and terrapins paddle with webbed feet in freshwater habitats.

A turtle’s ribs and backbone together form the turtle’s hard shell. It is covered in skin just like your bones are, a turtle’s shell is inside its body.

Sea turtles can hold their breath for over an hour by using the powers of their amazing heart. The heart blocks off blood to the lungs and allows the blood to travel to only parts of the body needing oxygen while under water!

The giant galapagos tortoise, aldabra tortoise, and african spurred tortoise can live to be over 170 years old!

Crocodilia – Crocodiles and family

With beautiful smiles and big strong tails, crocodilians number over 20 different species including crocodiles, alligators, caimans, and gharials. Gharials have very long, narrow snouts studded with sharp teeth.

crocodile

Crocodiles and alligators are a bit more difficult to tell apart. Alligators typically have broader snouts and straight rows of ridges down their backs. Crocodiles have narrower snouts and irregular rows of ridges on their back. When a crocodile’s mouth is closed, its fourth tooth on the lower jaw fits into a notch on the outside of the upper jaw.

There are only two different kinds of alligators; the american alligator and the very endangered chinese alligator.

Crocodilians are very shy creatures feeding on insects, snails, shellfish, frogs, turtles, fish, mammals, and birds. They rarely want to be near any human. We taste terrible!

Osteoderms on a gators back

The eyes and nostrils are located on top of their head to allow the animal to see and breathe above the water’s surface. They are covered in bony armor to protect them from both their prey and predators. It’s almost like having two skeletons!

We still have much to learn from crocodiles. We have found they are immune to some diseases, heal quickly, are intelligent, and are wonderful parents. Alligators even help other animals survive during droughts by digging water holes with their huge body. Sadly, most crocodilian species are in danger of becoming extinct!

Squamates – Lizards

World's smallest lizard

Lizards are the most diverse group of reptiles. They come in a huge variety of colors, shapes, and sizes. Lizards are split into two clades or groups, the Iguania and Scleroglossa (meaning hard tongue.) Some lizards can grow over 10 feet long like the komodo dragon and Salvadores monitor lizard. Others, like the Jaragua lizard are able to curl up on a dime.

A typical lizard has external ears, four legs, claws, eyes with eyelids, and tails. Scientists have found that lizards can see color, and some can even see in the ultraviolet wavelengths. Excellent eyesight allows the creatures to snatch bugs out of the air and to see spectacular mating displays.

Frilled lizard

A lizards sense of smell and taste is very actute. Monitor lizards even have a forked tongue like a snake to enhance smelling ability.

Lizards have found remarkable ways to survive. Many are covered in spines, some can stick to trees, most are able to lose their tails, others change colors, a few glide out of trees, and one species can even run across water!

What scientists have learned from lizards has been astounding. They are an amazing group of animals.

Squamates – Snakes

No other animal has been both revered and reviled more than the snake. They are the most widely feared and misunderstood animal on the planet. Very few kinds of snakes are able to harm people.

These slender reptiles have no legs, ears, or eyelids. Snakes are dry, not slimy as scales are made of keratin, the same thing your hair and fingernails are made of.

Madagascan Hognose snake sticking out his tongue

A snake’s forked tongue cannot sting or hurt you. A snake that is constantly flicking out it’s tongue is simply interested in its surroundings “sniffing’ like a dog. Chemicals or “scents” stick to the tongue as it waves it around. Then the scent laden tongue is stuck into the neuron studded Jacobson’s organ, a small hole in the roof of the mouth, sending instant messages about what it smells to its brain.

Central American Rattlesnake see his heatpits?

Remarkable organs known as heat sensing pits light up the night for some lucky snakes. Rattlesnakes, vipers, copperheads, boas, and pythons are able to distinguish in vivid detail differences in temperature allowing them to navigate and catch prey in complete darkness.

All snakes are carnivores. To catch prey, a snake must either bite it with fangs and inject venom, or use its body to subdue the animal using strong muscles. Swallowing the food is a challenge for an animal with no arms or legs! Their jaws are not strong enough to chew their food. Tiny curved teeth hook on to the food item, and allow it to only go in one direction, down the throat!

A snake’s head may appear too small to swallow many food items. Jaws of these animals have a hinge allowing them to open wide. The lower jaw includes two jaw bones connected in the middle with a streatchy ligament, so the mouth can open wide sideways as well. One side of the jaw holds the prey while the other side of the jaw slides forward, walking the food further into their mouth.

The largest snakes in the world are the anaconda and reticulated python, both able to grow over 30 feet long and weighing several hundred pounds. Jewels of this blue planet, snakes come in every color of the rainbow rivaling tropical fish and birds in their beauty.

Rhynchocephalia – Tuatara

Tuatara

A living fossil, the tuatara is an unusual reptile unchanged since the days of the dinosaurs. Although they look much like lizards, tuatara have different skulls, teeth, and pelvic bones. Living only in New Zealand in protected islands, these reptiles prefer lower temperatures than other reptiles. Tuataras live for a long time, probably over 100 years!

Unfortunately, they are highly endangered due to humans, habitat destruction, and introduced predators.

Reptiles and amphibians spend most of their time sleeping, they do not like to be touched or petted, and will not catch a frisbee. We receive calls daily about reptile pets that are no longer wanted by their owners. While reptiles are kept in a domestic setting they are still wild animals.

Giant Green Iguana

Please research extensively how to properly care for any animal before looking for one. Proper enclosures go well beyond a simple terrarium and a waterbowl. Expect to pay far more for everything you need to care for the animal than the animal itself.

Consider rescuing a reptile before purchasing one. Shelters and rescue agencies regularly receive unwanted reptile pets, and often have all their animals checked by a veterinarian before putting them up for adoption.

A great resource for reptile information online is: kingsnake.com

Join your local Herpetology Organization to meet others interested in reptiles. Many hold fun meetings and exciting field trips.

Virginia Herpetological Society

http://www.dnr.state.md.us/publiclands/southern/calvertcliffs.html

With only a two mile hike to the fossil filled beach, it was a treat.

We saw many frogs and other critters along the boardwalk. Caroline looks like she is about ready to go skipping. Tra-lah-lah-lah.

It was in the perfect 80′s. The boardwalk comes to an abrupt end. We have two miles ahead of us. Some fantastic scenery. And something possibly never seen before!

Can you find the turtle on the log in this picture?

Can you identify that turtle?  Me either, that little guy is WAY too far away.

Keep your eyes peeled on the other side of the walk or you might miss a HUGE worm snake.

Worm snakes (Carphophis amoenus) have tiny little eyes and look very much like a giant worm. The worms know the difference though. These snakes dine on worms! They even have a little spike on their tail to help push those wiggily-iggly slimy little worms in their mouth. Sssssslurps up!

Caroline fondly calls the worm snake and the next snake, LBS’s “little brown snakes.”  They may look the same, but they are very different.

Smooth Earthsnakes (Virginia valeriae) spend most of their time underground, they are fossorial.  They love to snoop under logs, boards, and rocks for yummy earthworms.

Does that sound like another snake?

Wormsnakes lay eggs like typical snakes.  Earthsnakes give live birth.  Visually, wormsnakes have pink bellies and a blunt snout.  Earth snakes have longer snouts and their scales include black specks.

Ringneck snakes are one of my favorite snakes to find.  When you first see them, they look like just another LBS.  If they get nervous, you get a surprise!  A brilliant yellow, orange, or red belly flashes into view as the snake flips and coils on the ground.

So far we have had amazing luck.

Now we are at the beach.  I am amazed at how blue the water is here!

Gorgeous!

These two pictures were sent to all my friends at work, to taunt them.

We get to play during the normal work week when there is no one around.  I love being alone out in the wild.  I imagine during the weekends, the beaches are filled with people looking for fossils.  You can have as many as you find on the beach.  Cool!

One guy we met found several shark teeth and even a few fossilized dolphin teeth.

Back on the trail, this little skink ran right out in front of us.  What is with these lizards?  Every time we see one I swear they are playing chicken on the hiking trail.  Are they making bets with other lizards to see how close they can get to a hiker without getting stepped on or caught?  Three worms for three inches!

Check out the huge ear on this guy!

On our way back, several people going the other way told us to watch out for the copperhead in the middle of the trail.  It was battling another snake, we swear!  Yeah, right.  For one it is most likely a non-venomous brown snake.  We doubted there was even another snake in the vicinity. Boy were we wrong!

Racer eating a copperhead

A northern black racer has wrestled and killed a bone fide copperhead snake.  Then, he began to eat it.  We stared in amazement until he slurped down the last of his tail.  Down like spaghetti.

Whoa!