Grey-headed gull
Videos
The grey-headed gull, also known as the grey-hooded gull, is a small species of gull which breeds patchily in South America and Africa south of the Sahara. It is not truly migratory, but is dispersive
Chroicocephalus cirrocephalus, Cassino, Rio Grande do Sul, Brazil 1
Chroicocephalus cirrocephalus, Naivasha, Kenya
Chroicocephalus cirrocephalus distribution
C. c. cirrocephalus in non-breeding plumage, Mejía, Peru
Bird migration
Videos
Bird migration is a seasonal movement of some birds between breeding and wintering grounds that occurs twice a year. It is typically between northern and southern regions. Migration carries inherent r
A flock of barnacle geese during autumn migration
Minoan fresco of swallows in springtime at Akrotiri, c. 1500 BC
The Rostocker Pfeilstorch, found in 1822, demonstrated that birds migrated rather than hibernating or changing form in winter.
A flock of common starlings assembling in Geneva, Switzerland, before migrating southwards