Appearance:

Slate grey upperparts with barred white underparts. Female and juvenile sometimes rufous brown. Male with defined grey breast in contrast to barred white belly, female with diffusely barred chest and throat. Yellow iris and thin bill. Wings and tail long and slender, often giving the impression of a small falcon. Often perches with a more horizontal posture than hawks or falcons, i.e. tail pointing backwards and not towards the ground, and drooping wings. In flight wings are not raise above horizontal plane, and it seldom glides like raptors.

Sound:

Song: the well known disyllabic "cuck-coo" with emphasis on first note, and the second note a third lower than the first one. Also a harsh "tchaa tchaa", and a bubbly trill, reminiscent of Little Grebe, uttered by the female.

Male:

Distribution:

Wikipedia: map (se also Xeno-canto below)

Ecology:

Birdlife ecology

Links:

Observation.org Latest observations

Video IBC

Image search Flickr NB! May give other species

Sound search at Xeno-canto

Featherbase

CC

Appearance:

Differs from Arctic Tern in longer head, and more orangy red, rather than deep red, bill. Tip of bill usually black. Legs longer, but tail streamers shorter than AT. Underparts of primaries with diffusely bordered dark trailing edge (sharply bordered in Arctic Tern). Upper side of primaries with dark wedge (less apparent in winter). Secondaries opaque. Crest more apparent than in Arctic Tern and underside whiter. Juveniles with buff back.

Sound:

Similar to Arctic Tern but deeper. Lacks latter's high pitched "tip-tip-tip" call, and the drawn out "kree-aaahh" call falls more distinctly in pitch.

Call:

Distribution:

Wikipedia: map (se also Xeno-canto below)

Ecology:

Birdlife ecology

Links:

Observation.org Latest observations

Video IBC

Image search Flickr NB! May give other species

Sound search at Xeno-canto

Featherbase

CC

CC-sound:Eetu Paljakka, Licence,Link.