A resident of the Tibetan Plateau, the ground tit lives above the treeline at elevations no lower than 3,000 metres (9,800 ft). It moves along the ground in unpredictable dashes and hops — said to resemble a bouncing rubber ball — and digs burrows for nesting and shelter.

The mistletoebird of Australia and Indonesia specializes in feeding on mistletoe berries — digesting the flesh and depositing the sticky seeds onto branches in neat lines, where they quickly germinate and grow. The bird is nomadic, in near-constant search of mistletoe berries.

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.

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.