Sand Martin (Riparia riparia)
Great Black-backed Gull (Larus marinus)
Small martin with dark brown chest-band and white throat. Upperparts dark brown, underparts white. Underside of wings dark. Juveniles with light fringes to brown feathers, and buff throat. Flight more elegant than Barn Swallow and House Martin. Often changes direction but keeps altitude. More fluttering flight than House Martin, with less gliding.
Sound:Contact call a mono- or disyllabic "trrrrt". Similar to House Martin but more raucous and less crisp, with less rolling r's, and with stable pitch throughout. Song a primitive improvisation on the contact call. Alarm call similar to House Martin; a sharp plaintive "tseep", but somewhat purer and more drawn.
Contact 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
CCAdults: Black back and pinkish legs. Large white windows at tips of primaries, and broad white trailing edge of wing. A very heavy gull with a heavy bill and broad wings. Juveniles with pale head, boldly spotted back and heavier bill than Lesser Black-backed and Herring Gull.
Sound:Can be identified from the low pitch alone. Clearly deeper than Lesser Black-backed and Herring Gull.
Call:
Distribution:
Xeno-canto: map
Ecology:Birdlife ecology
Links:
Observation.org Latest observations
Image search Flickr NB! May give other species
CC