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 (end of October to mid November)

Even as we reach the beginning of November, autumn migration is still very evident. Birds continue to arrive in the UK from more northerly regions to spend the next few months here in our warmer winters, before...

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BTO Data Reports

Our reports provide rigorous scientific information to inform Environmental Impact Assessments in the UK.

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Raptor ID training (2 sessions, Wednesdays 7pm)

The training will consist of two weekly online modules of 90–100 minutes each, complemented by supported self-study exercises which will be provided after each session. The training will be run by BTO staff members Nick...

Identifying grey harriers

BTO bird identification videos are supported by Natureguides

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BirdTrack migration blog (end of October to mid November)

BTO Data Reports

Raptor ID training (2 sessions, Wednesdays 7pm)