Types of Frogs

Red-eyed Tree Frog
Red-eyed Tree Frog

The red-eyed tree frog (Agalychnis callidryas) is a species of tree frogs.

Red-eyed tree frogs spend most of their time on large tropical leaves. They are not poisonous, and rely on camouflage to protect themselves. During the day, they stay still, cover their blue sides with their back legs, tuck their bright feet under their stomachs, and shut their red eyes. So they look almost completely green, and are well hidden among the leaves. The large red eyes are a defensive adaptation. When a red-eyed tree frog detects a predator, it abruptly opens its eyes and stares at the predator. The sudden appearance of the red eyes may startle the predator, giving the frog a chance to flee.

They are active at night. They like to eat small insects.

Tyler's tree frog has large toe pads and webbed feet
Tyler’s tree frog has large toe pads and webbed feet
There are a number of tiny tree frogs which develop from eggs laid in water pools on tropical leaves many meters above the ground. Most of these species do not come to the ground except to mate. Tree frogs have evolved a number of times, but they all have almost identical adaptations. Many millions of years of convergent evolution have resulted in almost identical morphology and habits.
The Limnonectes family are known as ‘fanged frogs’ because of twin projections on their lower jaws that are used in fighting. Sulawesi is an island which is rapidly losing its forests. The tropical forest is where this frog lives.
  • The largest frog is the African Goliath frog (Conraua goliath). The maximum recoreded weight is 3.8 kg (8.4 lb), and a snout-to-vent length of 39 cm (15 in).
  • Paedophryne amauensis is not just the smallest frog, but the smallest vertebrate, 7.7 millimetres (0.30 in) long.
shows the location of the Goliath frog
shows the location of the Goliath frog https://en.wikipedia.org/wiki/File:RangeMapConrauaGoliath.png

 

Some frog species are adapted to a cold environment. The wood frog (Rana sylvatica), whose habitat extends into the Arctic Circle, buries itself in the ground during winter. Although much of its body freezes during this time, it maintains a high concentration of glucose in its vital organs, which protects them from damage.

 

Look at the poison frogs below. What’s different about them from the other frogs and toads you’ve seen?