What is a lizard?

Striped skink - Image: DoC
Very little is known about the striped skink
 
A copper skink hatches its eggs internally - Image: Geoff Moon
Most native lizards hatch their eggs internally

Lizards are varied in shape and have paired limbs usually with five toes. They are adapted for running climbing or paddling. Lizards have strong jaws with teeth.

A lizard's skin is made of tiny scales with few glands so they lose little water through their skins.

Lizards can be diurnal or nocturnal and they live in all sorts of places. Some live in trees, others on the ground, while some like to live by the sea. They rely on their environment for warmth.

Lizards often hear or smell their food before they see it. Their diet is mainly insects but they also eat berries and seeds. They may lick the nectar from flowers. Lizards help spread seeds and they also pollinate some types of flowers.

Lizards' ears are small openings located behind their eyes. Their nostrils are at the end of their noses.

Lizards are territorial and nearly all of them make noises. They have brightly coloured mouths to scare away predators and other lizards.

Most lizards lay eggs. The Suters skink is the only native lizard that lays eggs as all others give birth to live young. These females hatch their eggs internally.

skinks | geckos | chevron skink facts | chevron skink pictures

The following table summarises facts about lizards and will be used in other parts of LEARNZ2001 for specific lizards.

 

Parts of a lizard

Features

Major Functions

External

Bones

Strong

Well developed neck

Protects internal organs

Supports head

Mouth

Powerful

Efficient jaw

Tongue

Catching and eating food

Licking eyes - geckos

Blood

Cold blooded

Obtain most of its body heat from the environment

Organs and muscles

3 chambered heart

Lungs

Respiration

Skin

 

Hard

Smooth

Dry

Scales

Coloured

Few glands

Reduce water loss

Camouflage

Absorb heat

Regrow tail

Legs and feet

Paired legs

Usually 5 toes

Climbing

Running

Paddling

Eyes

Moveable eyelids (except geckos)

See in the dark

Ears

External openings

Hearing prey

Communicating with other lizards

Eggs

 

External or internal hatching

Reproduction

© Heurisko Ltd www.learnz.org.nz/2001