Iberian Magpie (Cyanopica cooki)
Black Tern (Chlidonias niger)
Build like a Magpie, but slightly more slender. Black hood, white throat, buff body and beautiful azure-blue wings and tail. Unmistakable if seen well. In unfavorable conditions the long tail in combination with the black hood and contrasting pale throat is diagnostic. Sexes alike. Flight similar to Magpie, but less staccato and more decisive. Behaves more like a Jay than a Magpie, and usually moves about in small groups.
Sound:Most typical call is a high-pitched, finch-like, rapidly ascending "hvrriit" (similar to some Siberian Jay or Jay calls). Has a rich repertoire various social sounds of which some are more Magpie-like, like a dry and rolling "krrrrrrr".
Contact call, interaction calls:
Distribution:
Xeno-canto: map
Ecology:Birdlife ecology
Links:
Observation.org Latest observations
Image search Flickr NB! May give other species
CCUnmistakable in breeding plumage, but otherwise easily confused with other marsh terns. Breeding plumage with black head and belly, but pale underwing and grey rump. When in immature and winter plumage it differs from Common and Arctic tern by smaller size and short, moderately forked tail, and from other marsh terns by slimmer body and wings (compared to White-winged tern), and relatively long, thin bill. Both immature and adult winter show dark front edge of wing, and characteristic dark shoulder patch at wing base. Back is dark in immature birds. Grey rump in all plumages. Flight usually different from Sterna-terns, with erratic dives for no apparent reason, and "aimless" change of direction. Note that when foraging over saltwater, flight becomes more Sterna-like.
Sound:Moderately vocal. Flight call a more or less clear "kleck, or a disyllabic "klee-ake" with accented first syllable. Sometimes slightly rolling "klirr-eke", but never as much as in White-winged Tern. Also a slightly harsher "kreek", but not as raspy as in Whiskered Tern.
Flight call:
Distribution:
Wikipedia: map (se also Xeno-canto below)
Ecology:Birdlife ecology
Links:
Observation.org Latest observations
Image search Flickr NB! May give other species
CC