Agriculture
Microbes at the Gas Pump
Watching out for vultures
Hungry bug seeks hot meal
Amphibians
Salamanders
Toads
Salamanders and Newts
Animals
Fishing for Giant Squid
Insects Take a Breather
Chicken Talk
Behavior
Longer lives for wild elephants
Dino-bite!
Eating Troubles
Birds
Vultures
Robins
Falcons
Chemistry and Materials
Earth-Friendly Fabrics
Cooking Up Superhard Diamonds
Undercover Detectives
Computers
Troubles with Hubble
The hungry blob at the edge of the universe
Galaxies on the go
Dinosaurs and Fossils
A Really Big (but Extinct) Rodent
A Dino King's Ancestor
From Mammoth to Modern Elephant
E Learning Jamaica
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Results of GSAT are in schools this week
2014 GSAT Results for Jamaican Kids
Earth
Earth's Poles in Peril
Earth Rocks On
A Dire Shortage of Water
Environment
Power of the Wind
Missing Tigers in India
Spotty Survival
Finding the Past
A Plankhouse Past
A Long Trek to Asia
Ancient Cave Behavior
Fish
Angler Fish
Pygmy Sharks
Carp
Food and Nutrition
Symbols from the Stone Age
Eat Out, Eat Smart
A Pepper Part that Burns Fat
GSAT English Rules
Pronouns
Subject and Verb Agreement
Order of Adjectives
GSAT Exam Preparation Jamaica
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
GSAT Scholarship
Mastering The GSAT Exam
GSAT Exams Jamaica Scholarships
42,000 students will sit for the GSAT Exam in two weeks
GSAT Practice Papers | GSAT Mathematics | Maths
Results of GSAT are in schools this week
GSAT Mathematics
42,000 students will sit for the GSAT Exam in two weeks
Math and our number sense: PassGSAT.com
Detecting True Art
Human Body
Kids now getting 'adult' disease
From Stem Cell to Any Cell
Taking the sting out of scorpion venom
Invertebrates
Lobsters
Oysters
Camel Spiders
Mammals
Asian Elephants
Bobcats
Boxers
Parents
Expert report highlights the importance to parents of reading to children!
What Not to Say to Emerging Readers
The Surprising Meaning and Benefits of Nursery Rhymes
Physics
IceCube Science
Thinner Air, Less Splatter
Project Music
Plants
Stalking Plants by Scent
Seeds of the Future
Underwater Jungles
Reptiles
Lizards
Copperhead Snakes
Snapping Turtles
Space and Astronomy
Melting Snow on Mars
Killers from Outer Space
Baby Star
Technology and Engineering
Searching for Alien Life
Machine Copy
A Satellite of Your Own
The Parts of Speech
What is a Noun
Problems with Prepositions
Countable and Uncountable Nouns
Transportation
Where rivers run uphill
Robots on the Road, Again
Middle school science adventures
Weather
The solar system's biggest junkyard
A Change in Climate
Antarctica warms, which threatens penguins
Add your Article

Lizards

Although sometimes used as a general term for all reptiles, lizards are actually a specific order of reptiles. Most lizards have long, four-legged bodies with long, tapering tails, and many species have the ability to change the color of their skin (some just a little, but some quite dramatically) as a form of camoflage. Although a large number of lizards are insectivores (insect eaters) larger species are carnivorous hunters, eating small prey such as rodents or eggs. Lizards are reptiles of the order Squamata, which they share with the snakes (Ophidians). They are usually four-legged, with external ear openings and movable eyelids. Species range in adult length from a few centimeters (some Caribbean geckos) to nearly three meters (Komodo dragons). Some lizard species called "glass snakes" or "glass lizards" have no functional legs, though there are some vestigial skeletal leg structures. They are distinguished from true snakes by the presence of eyelids and ears. The tail of glass lizards, like many other lizards, will break off as a defense mechanism, unlike snakes. Many lizards can change color in response to their environments or in times of stress. The most familiar example is the chameleon, but more subtle color changes occur in other lizard species as well (most notably the anole, also known as the "house chameleon" or "chamele"). Lizards typically feed on insects or rodents. A few species are omnivorous or herbivorous; a familiar example of the latter is the iguana, which is unable to properly digest animal protein. Until very recently, it was thought that only two lizard species were venomous: the Mexican beaded lizard and the closely-related Gila monster, both of which live in northern Mexico and the southwest United States. However recent research at the University of Melbourne, Australia and Pennsylvania State University has revealed that in fact many lizards in the iguanians and monitor (lizard) families have venom-producing glands. None of these poses much danger to humans, as their poison is introduced slowly by chewing, rather than injected as with poisonous snakes. Nine toxins previously thought to only occur in snakes have been discovered, and a number of previously unseen chemicals as well. These revelations are prompting calls for a complete overhaul of the classification system for lizard species to form a venom clade. "These papers threaten to radically change our concepts of lizard and snake evolution, and particularly of venom evolution," says Harry Greene, a herpetologist at Cornell University in New York. Most other lizard species are harmless to humans (most species native to North America, for example, are incapable even of drawing blood with their bites). Only the very largest lizard species pose threat of death; the Komodo dragon, for example, has been known to attack and kill humans and their livestock. The Gila Monster and Beaded Lizard are venemous however, and though not deadly, can inflict extremely painful and powerful bites. The chief impact of lizards on humans is positive; they are significant predators of pest species; numerous species are prominent in the pet trade; some are eaten as food (for example, iguanas in Central America); and lizard symbology plays important, though rarely predominant roles in some cultures (e.g. Tarrotarro in Australian mythology). Most lizards lay eggs, though a few species are capable of live birth. Many are also capable of regeneration of lost limbs or tails. Lizards in the Scincomorpha family, which include skinks (such as the blue-tailed skink), often have shiny, iridescent scales that appear moist. However, like all other lizards, they are dry-skinned and generally prefer to avoid water. All lizards are able to swim if needed, however, and a few (such as the Nile monitor) are quite comfortable in aquatic environments.

Lizards
Lizards








Designed and Powered by HBJamaica.com™