The Orange-thighed Frog (Litoria xanthomera) is a tree frog

Tree frog

Hylidae is a wide-ranging family of frogs commonly referred to as "tree frogs and their allies". However, the hylids include a diversity of frog species, many of which do not live in trees, but are terrestrial or semi-aquatic.-Characteristics:...

 native to a small area of tropical northern Queensland

Queensland

Queensland is a state of Australia, occupying the north-eastern section of the mainland continent. It is bordered by the Northern Territory, South Australia and New South Wales to the west, south-west and south respectively. To the east, Queensland is bordered by the Coral Sea and Pacific Ocean...

, Australia

Australia

Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...

. It is a green frog with distinctly orange eyes, and is very similar in appearance to the Red-eyed Tree Frog

Litoria chloris

Litoria chloris, also commonly known as the Red-eyed Tree Frog or Orange Eyed Tree Frog, is a species of tree frog native to eastern Australia; ranging from north of Sydney to Proserpine in mid-northern Queensland.-Description:...

 (Litoria chloris).

Physical description

The Orange-thighed Frog is a medium-sized tree frog, reaching a length of 5.5 centimetres. It is a slender frog, with a thin body, flat head and large eyes, which are orange in colour. It has a green dorsal surface, with bright yellow feet, vocal sac

Vocal sac

The vocal sac is the flexible membrane of skin possessed by most male frogs. The purpose of the vocal sac is usually as an amplification of their mating or advertisement call...

 and a yellow band down its flank. The inner surface of its legs are yellow, and the outer surface is green. It is distinguished, physically, from the Red-eyed Tree Frog by the presence of bright orange thighs, the Red-eyed Tree Frog has mavue thighes.

Ecology and behaviour

Male Orange-thighed Frogs congregate around still pond

Pond

A pond is a body of standing water, either natural or man-made, that is usually smaller than a lake. A wide variety of man-made bodies of water are classified as ponds, including water gardens, water features and koi ponds; all designed for aesthetic ornamentation as landscape or architectural...

s, and call from low branches, or the edge of the water. The call is a long "aaa-rk", followed by a soft trill. They call after heavy monsoon

Monsoon

Monsoon is traditionally defined as a seasonal reversing wind accompanied by corresponding changes in precipitation, but is now used to describe seasonal changes in atmospheric circulation and precipitation associated with the asymmetric heating of land and sea...

 rain. The males call in a large chorus; amplexus occurs where the frog calls, and the male and female move to the laying site. The eggs

Egg (biology)

An egg is an organic vessel in which an embryo first begins to develop. In most birds, reptiles, insects, molluscs, fish, and monotremes, an egg is the zygote, resulting from fertilization of the ovum, which is expelled from the body and permitted to develop outside the body until the developing...

 are brown, and are in masses of 800 to 1600. The tadpoles are identical in appearance to the Red-eyed Tree Frog.

The Orange-thighed Frog inhabits dense rainforest

Rainforest

Rainforests are forests characterized by high rainfall, with definitions based on a minimum normal annual rainfall of 1750-2000 mm...

.