The Titicaca water frog lives solely in the depths of Lake Titicaca in the Andes mountains at elevations of 3,810 metres (12,500 feet). Its copious skin folds allow it to breathe — through cutaneous respiration (skin breathing) — at such high altitudes, its lungs are only 1/3 the size they should be.

The dwarf mongoose — Africa's smallest carnivore — uses old termite mounds as shelter, living with a family of up to 30 individuals. When foraging for insects, these mongooses work together with hornbills; the mongooses flush out insects and the hornbills watch for aerial dangers.

The common cockchafer spends its first 3 to 5 years below ground, growing as a larva. Then, all at once, these beetles emerge as adults in great numbers during spring. They clumsily buzz about, using their frilly antennae to find mates and reproduce — they live for only 6 weeks in this form.

The Amazon milk frog isn't named for its milky white appearance, instead, its name refers to a poisonous milky substance that it secretes when threatened. It also uses the fluid as "sunscreen" — lathering it over its body to prevent itself from drying out in the sun.

The common snake-necked turtle has a serpentine neck that can grow to more than half the length of its 28 cm (11 inch) long shell. It uses this neck to snatch prey underwater. When it strikes, it quickly lowers a bottom jawbone, creating a vacuum that sucks the prey into its mouth.

The snowy sheathbill is an Antarctic scavenger. It eats anything it can find or pilfer; from faeces to regurgitated penguin chick food and even elephant seal milk straight from the teat. It often stands on one foot to reduce heat loss — a technique that also makes it quite clumsy.

The pancake tortoise's shell is uniquely flat and flexible. While this lightweight armouring doesn't offer much defence, it does make it the fastest of all tortoise species. When in danger, it will swiftly wedge itself in between rocks.

The Devils Hole pupfish is perhaps the rarest fish in the world. It lives in the desert; its entire population is found in one 33.8°C (93°F) pool — mostly on a 3.5 by 5 m (11 by 16 ft) rock shelf — inside a cave in Death Valley, Nevada.

The white-tailed tropicbird performs noisy, aerial displays — swaying its tail streamer from side to side while gliding through the sky. A male courts a mate by flying above her and touching his tail to hers, they then glide away together in synchronized zigzag flight to find a nesting spot.

The brush-tailed phascogale is a carnivorous, tree-climbing marsupial from Australia. It is able to erect the long, black hairs on the end portion of its tail — this 'bottle-brush' tail is used to draw a predator's attention away from its body.

This arboreal squirrel is exceedingly energetic, spending upwards of 75% to 96% of its time being active. Most of this time is devoted to foraging; for bark and buds in winter, flowers in spring, fruits, seeds, and insects in summer and autumn. Males will also fervently chase females as part of courtship.

Australian ravens are opportunistic feeders, eating anything from carrion to biscuits and bread — they have been seen dipping pieces of these into water to soften them. They will bash snails against rocks to get at their insides. Sometimes they even steal golf balls, mistaking them for eggs.

The sulphur-crested cockatoo communicates with extremely loud screeching calls. The cacophonous noise from a rowdy flock can be near-deafening. As these birds forage on the ground with their flock, there is usually a lookout who sits in the trees and gives an alarm cry if danger approaches.

A brown anole male can sometimes be spotted doing "push-ups", often with his orange-red dewlap — or "throat fan" — on full display. This performance can either be threatening or seductive, depending on the context, as he will do this to both scare away rivals and attract females.

The jaws of a Tasmanian devil can open to an 80-degree angle, able to deliver the strongest bite of any carnivorous mammal relative to body size. Nicknamed the "Australian hyena", the devil is a bone-crunching scavenger, gorging on dead bodies before they can fester and spread disease.