Identifying grey harriers

Harriers are stunning, lithe and elegant birds of prey. Two species of grey harrier are regularly found in the UK, Hen and Montagu's - the males are relatively easy to separate, but the females and young birds can be more tricky.

BTO bird identification videos are supported by Natureguides

Natureguides kindly provide species video clips for our bird identification videos.

BirdTrack migration blog – early spring

It may still feel like winter but for some species, the increasing temperatures and lengthening days have already kick-started spring migration, with birds starting to arrive and depart across Britain and Ireland.

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Tagged Lesser Black-backed Gull. Gary Clewley

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Bird tracking

Phil Atkinson explains the technology behind tracking.

Identifying grey harriers

BTO bird identification videos are supported by Natureguides

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