Agriculture
Getting the dirt on carbon
Cleaning Up Fish Farms
Watching out for vultures
Amphibians
Salamanders and Newts
Poison Dart Frogs
Salamanders
Animals
Hot Pepper, Hot Spider
Pothole Repair, Insect-style
Vent Worms Like It Hot
Behavior
Pondering the puzzling platypus
The Disappearing Newspaper
Math Naturals
Birds
Crows
Doves
Turkeys
Chemistry and Materials
Hair Detectives
Supergoo to the rescue
Supersonic Splash
Computers
Middle school science adventures
Earth from the inside out
Troubles with Hubble
Dinosaurs and Fossils
Watery Fate for Nature's Gliders
Feathered Fossils
A Really Big (but Extinct) Rodent
E Learning Jamaica
2014 GSAT Results for Jamaican Kids
Results of GSAT are in schools this week
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Earth
Island of Hope
Farms sprout in cities
Quick Quake Alerts
Environment
Pumping Up Poison Ivy
Improving the Camel
A Change in Leaf Color
Finding the Past
Meet your mysterious relative
Writing on eggshells
A Big Discovery about Little People
Fish
Eels
Tiger Sharks
Lungfish
Food and Nutrition
Allergies: From Bee Stings to Peanuts
The Essence of Celery
Making good, brown fat
GSAT English Rules
Whoever vs. Whomever
Problems with Prepositions
Finding Subjects and Verbs
GSAT Exam Preparation Jamaica
2014 GSAT Results for Jamaican Kids
Mastering The GSAT Exam
GSAT Exam Preparation
GSAT Exams Jamaica Scholarships
GSAT Practice Papers | GSAT Mathematics | Maths
2014 GSAT Results for Jamaican Kids
GSAT Exam Preparation
GSAT Mathematics
Monkeys Count
How a Venus Flytrap Snaps Shut
GSAT Mathematics Quiz, Teaching Math, teaching anxiety
Human Body
Surviving Olympic Heat
Gut Microbes and Weight
Tapeworms and Drug Delivery
Invertebrates
Crabs
Flies
Dust Mites
Mammals
Sea Lions
Donkeys
Miscellaneous Mammals
Parents
Children and Media
What Not to Say to Emerging Readers
Expert report highlights the importance to parents of reading to children!
Physics
Project Music
Invisibility Ring
Speedy stars
Plants
Making the most of a meal
Farms sprout in cities
Fastest Plant on Earth
Reptiles
Pythons
Boa Constrictors
Sea Turtles
Space and Astronomy
Sounds of Titan
Slip-sliding away
Big Galaxy Swallows Little Galaxy
Technology and Engineering
Sugar Power for Cell Phones
Slip Sliming Away
Beyond Bar Codes
The Parts of Speech
Adjectives and Adverbs
Pronouns
Problems with Prepositions
Transportation
Middle school science adventures
Troubles with Hubble
How to Fly Like a Bat
Weather
Earth's Poles in Peril
Either Martians or Mars has gas
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™