The nests of the spiderhunters are different, both from the sunbirds and in some cases from each other.

Ants may form subterranean nests or build them on trees.

A reduction in penguin nests in Admiralty Bay, South Shetland Island, was also reported.

Some arthropod species spend part of their lives within ant nests, either preying on ants, their larvae, and eggs, consuming the food stores of the ants, or avoiding predators.

Some Troctomorpha, such as Liposcelis (which are similar to lice in morphology), are often found in birds' nests, and it is possible that a similar behavior in the ancestors of lice is at the origin of the parasitism seen today.

In many nocturnal species, for instance, the females, along with their young, will share nests with other females and possibly one male, whose larger home range happens to overlap one or more female nesting groups.

The most widespread of such species are the common clothes moth ( Tineola bisselliella ), the case bearing clothes moth ( Tinea pellionella ), and the carpet moth ( Trichophaga tapetzella ) the brown dotted clothes moth ( Niditinea fuscella ) despite its name, preferentially feeds on feathers in bird nests.