Focus on: Pomarine Skua
David Callahan explores the biology of this enigmatic and piratical passage migrant.
David Callahan explores the biology of this enigmatic and piratical passage migrant.
David Callahan reveals the hidden life of the scarce Continental songbird visitor that – unusually – migrates from the mountains west for the winter.
Black Redstart colonised Britain after World War II, apparently exploiting the post-war wreckage as a simulation of its mountain habitats; however, urban regeneration now seems to be reversing its spread. David Callahan charts its changing fortunes.
Eurasian Spoonbill is one of several large waterbird species usually associated with the Mediterranean which has recently colonised England but, as David Callahan outlines, it has a much longer history in Britain's avifauna.
Once a breeding species in Britain, Kentish Plover has gradually declined to the point it is now classified as a rarity. David Callahan explores its fascinating history.
A very scarce breeding species and much more widespread in winter, Snow Bunting has a long history in Britain, but could find itself pushed out as the climate warms. David Callahan looks at the species' life and times.
A rare wader described from Australia was at the heart of a puzzle that took decades to solve. David Callahan tells the story of the rise and fall of the 'endangered' Cox's Sandpiper.
David Callahan visited the emerging Spanish hot-spots of Alicante and Valencia to see the provinces' specialities, and found them to be brimming with birds.
David Callahan visited the emerging Spanish hot-spots of Alicante and Valencia to see the provinces’ specialities, and found them to be brimming with birds.
Birders want to see genuinely wild birds, but in the case of Stock Dove this can be problematic, with the widespread and very similar Feral Rock Dove causing confusion. David Callahan identifies the differences.