Chaffinch. Edmund Fellowes

The Chaffinch population has fallen by a quarter in just five years.

Identifying Common Buzzard and Rough-legged Buzzard

In winter, Honey-buzzard is replaced by Rough-legged Buzzard as the key confusion species with Common Buzzard. This identification video talks about the features to focus to help make it a little easier to identify this sometimes difficult pair.

BTO bird identification videos are supported by Natureguides

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

Bird tracking - a masterclass

Phil Atkinson explains the technology behind tracking.

Chaffinch and Greenfinch. Edmund Fellowes

Case Study

What we can learn from 25 years of watching gardens

Exploring the value of a complete quarter-century of weekly garden bird observations from BTO's Garden BirdWatch covering the length and breadth of the country.