See nidicolous.

Parts of the bird have specific names that can help in identifying birds. See diagrams.

The charts show the maximum number of any one species visiting the garden at any one time in a particular week. This method of counting is used in the Garden Birdwatch survey.

Eclipse plumage describes the plumage of drake wild fowl in the autumn when they have shed their wing feathers. The usual spectacularly bright plumage would put them at risk from predators, so they moult to a drabber plumage (similar to the female) which offers better camouflage and more protection.

The time when a chick is getting its first set of proper feathers.

A young bird that has learnt to fly. This is often mistakenly used to mean a nestling, but many birds learn to fly while still dependent on their parents.

This is a bird species of the hirundinidae family and is often used by birders to describe mixed groups of Swallows and martins. Swifts are not hirundines.

An immature bird is a juvenile that has undergone its first moult but does not yet have full adult plumage.

The period is the time between the egg being laid and the nestling hatching.

A young bird that is no longer dependent on its parents but has not gained its adult plumage.