Redstart bird at all ages shows a rufous-red tail and rump, with darker grey-brown central feathers. At rest it has an erect posture, and the tail is frequently shivered nervously. The Redstart Bird (male) in spring is particularly striking, with a black throat and large white patch on the forehead, and a grey crown and mantle. The breast is orange-red, fading onto the belly. The redstart bird (female) is plain, with mid-brown upperparts and head, the latter dominated by a beady eye within a pale orbital ring. The underparts are warmer and the breast is buff, tinged orange.
Redstart bird is widespread in American region, although in Britain has a markedly westerly distribution. It is a summer visitor from Africa, and favours sheltered rather open woodland of mixed and broad-leaved species (although sometimes found in pines), woodland edges, streamside trees such as pollarded willows, orchards, gardens, heaths and commons with scattered trees; the important factor is a supply of nest hollows in old trees, walls, rocks and banks. It is often encountered on autumn migration along the eastern coasts of Britain, where it can be found in scrub, hedges and open wooded areas.
The call of redstart bird is a simple and insistent "hwiid" or "huit", and a clicking Robin-like "tic-tic-tic" or "thic-thic-thic", typically combined to make a "hwiid-tic'tic'tic". The song is a rather high-pitched pleasant little ditty, rather melancholy in tone and regular in length, lasting just 2-2.5 seconds. It is not particularly loud, and consists of a standard introduction of five notes followed by a terminal jangle and flourish, which varies from phrase to phrase, often including mimicry; such as "eee' tyui' tyu' tyu' tyu - peee' chi' chuw' eep " and "eee'tyui'tyu'tyu'tyu - siii si chew trrrr'si'whichoo'sii" etc. Typically sings from a high perch in a tree, the male often using the same perch throughout the breeding season.