The vireos are a group of migratory warbler-like birds of the Americas. Birds of the tree canopy, they have relatively dull plumage, a robust build and heavy bills. Although they feed largely on ...

The American wood warblers are similar in in size, shape and habits to the old world warblers, to which they are not at all related, though they are generally rather more colourful, particularly the ...

Perhaps the most graceful of seabirds, their buoyant flight and long tail-streamers means they well deserve their alternative name of sea-swallows. Found throughout the world, they are summer visitors ...

Frigatebirds are highly maneuverable aerial predators of tropical waters. The five species all breed in large colonies in trees on tropical islands. During courtship the males (which are mostly black) ...

BTO Research Reports are scientific papers that have been self-published by the BTO. The following is a full list of the published BTO research reports. Most are free to download, and links to ...

‘Biodiversity’ describes the variety of life in an area. It can be measured in areas as small as a back garden and as big as the entire Earth, and encompasses everything from genetic diversity and ...

This small family of waders is charcterised by slender bodies and long wings; the pratincoles also have very short legs. They are charcteristic of open semi-desert habitat in Africa, Asia and ...

Spend any time watching your gardens birds and you'll soon discover a host of different behaviours. It might be a Blackbird preening its feathers, a group of Starlings whirling about the sky in a ...

Commonly referred to as the UK Red List for birds, the status of birds has now been reviewed five times, covering the UK, Channel Islands and Isle of Man. The latest review was published in December ...

Scotland has remote and dramatic landscapes - it’s part of what makes it special. It also has a relatively low human population density. These things combined make it harder to find all of the ...

The BTO Acoustic Pipeline enables accurate species identification and data management for acoustic monitoring, in conservation, management and site assessment. It offers bespoke audible classifiers ...

Waterbirds in the UK presents the results of the annual Wetland Bird Survey Report. Since 2022, Waterbirds in the UK is also ...