Appearance:

Only in the UK. Similar to Red and Parrot Crossbill in plumage. Bill size possibly the only visual identification clue, but even this overlaps with the other two species. Bill is usually deeper and heavier than Red Crossbill. Certain separation from Parrot Crossbill in the field by visual characters alone, probably not possible. Species status mainly upheld by isolated breeding population and differences in excitement calls from other crossbills. Calls probably play an important role in maintaining the reproduction barrier between Crossbill populations with different bill-size. See Birdlife link below for more info.

Sound:

Calls very similar to Parrot Crossbill, and sonogram analysis may be needed for certain identification. Flight and excitement calls show most unique quality. Sonogram image above by Ron Summers (used with permission). A detailed article about crossbill calls can be found here.

Distribution:

Xeno-canto: map

Ecology:

Birdlife ecology

Links:

Observation.org Latest observations

Video IBC

Image search Flickr NB! May give other species

Sound search at Xeno-canto

CC

Collage photo By Richard Crossley (The Crossley ID Guide Britain and Ireland) [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons.

Appearance:

Small head, short, thick neck, quite broad wings and fairly short tail. May be confused with a range of different species due to the highly variable plumage. Underparts range from almost white to very dark. Plumage tone ranges from chocolate to rusty brown. Dark morph usually with pale breast band. Shows 5 fingers like other Buteo, as opposed to small eagles. Tail lacks the broad terminal band of Rough-legged Buzzard. Neck thicker than in Honey Buzzard. Secondary coverts form a pale band in dark morph. Light morph typically with primary coverts forming black 'comma'. Soars with raised wings, but glides on straight wings.

Sound:

Quite vocal. Most typical call a wailing, mewing "peeoooo". Quite similar to Rough-legged Buzzard, but the pitch falls more rapidly and is then sustained for the last part of the call.

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:Piotr Szczypinski, Licence,Link.