Native to sub-Saharan Africa and the Nile River Valley, the Egyptian goose has now settled in N. America, much of Europe, and parts of the Middle East. Although normally quite reserved and shy, males will become boisterous and aggressive during their breeding season to attract a female.

The coppersmith barbet — a small bird about 16 cm (~6 in) long — often falls victim to bullying by other birds. Blue-throated barbets have been observed evicting coppersmiths from nesting holes, while red-vented bulbuls steal berries from male coppersmiths that are trying to feed their mates.

The black drongo keeps its neighbourhood clear of predators by fearlessly assailing them — as a result, other birds like orioles, doves, babblers, and bulbuls like to nest near the drongo. But the drongo is also a trickster, mimicking the calls of raptors to scare birds into abandoning their food.

Steller's sea-eagle is a rare raptor from the rocky coasts and rivers of northeastern Siberia — flying southwards to Hokkaido, Japan, in winter. It's the world's heaviest eagle and a particularly aggressive species, known to frequently steal fish caught by other eagles.

Lidth's jay is only found on a few of the Ryukyu Islands in southwestern Japan. Its existence has been threatened by the introduction of mongooses and an increased crow presence on these islands. As of a 2016 survey, fewer than 3,900 mature jays are estimated to remain.

To make his presence known, a male copper pheasant will drum loudly with his wings — creating a booming "phrrrrp" sound — and show off his tail feathers, which can grow to be 125 cm (4.1 ft) long. The males also fight for a female's favour; jumping and kicking at each other to decide a victor.

For over 1,300 years, the Japanese cormorant has been part of a traditional fishing method known as ukai. A dozen cormorants swim alongside a wooden boat, each held by a leash around the neck. The cormorants catch and swallow fish into their throat pouches and, afterwards, the fishermen make them "cough it up".

A male blood pheasant has splatters of "bloody" feathers across his face, breast, and tail. This species lives in the Himalayan Mountains, feeding mostly on mosses and moving with the snowline between elevations of 3,200–4,700 metres (10,500–15,400 ft). It's adapted to resist both hypoxia and high UV radiation.

The torrent duck is highly adapted for hunting within the fast-flowing rivers of the Andes — it kicks with powerful webbed feet, its long claws cling to slippery rocks, and its sleek body allows it to scale waterfalls. Even chicks, soon after hatching, plunge into the dangerous currents.

The willie wagtail is aggressively territorial. It's known to harass much larger birds (including eagles), venomous snakes, and humans that wander too close to its nest. Before an assault, it flares its white "eyebrows", making it look especially enraged.

While the spotted owlet is nocturnal, it can sometimes be seen during the day — it will bob its head and stare intensely at anyone who bothers it. This owlet can be located by watching for the small birds that often mob it or — during dusk and dawn — by the owlet's “chirurr-chirurr-chirurr” chuckle.

The speckled mousebird hangs belly to belly with others in its flock to keep warm while sleeping. After a meal — of toxic plants, clay, dirt, and peddles — a mousebird may hang upside down, exposing the black skin of its belly to the sun in order to warm up and aid digestion.

The large-billed tern uses its disproportionately long and thick beak to catch fish — either by plunge-diving into the water or skimming the surface with its beak as it flies. It has a commensal relationship with the tucuxi river dolphin, which often flushes fish towards the surface while hunting.

Endemic to Fiji, the golden fruit dove exhibits remarkable sexual dimorphism — the female is forest green while the male is a brilliant golden yellow. This dove lives in the canopy and is more often heard than seen, producing dog-like barking, low growling, and snoring noises.

The palm-nut vulture is unusual among vultures, in that about 70% of its diet is vegetarian — mostly consisting of palm nut fruits. It was once called the "vulturine fish eagle”, because of its eagle-like appearance and the way in which it hunts; swooping to the water's surface to grab fish.

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 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.

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.