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:

Similar to Starling, and may be difficult to tell apart in winter and immature plumages. Most birds are in breeding plumage from March on, completely lacking spots, and with a purple (not green) sheen. Flight feathers lacks pale fringes, and the overall look is much darker than Starling. Elongated head and throat feathers are slightly longer than in Starling. Winter and immature plumage birds difficult to identify, but has small and spearhead-shaped spots, and darker wings (due to lack of pale fringes). Leg colour generally paler pink, than Starling, but some overlap occurs.

Sound:

Similar to Starling in form and variation, but the long, descending whistling notes are more dominant and accented. Sometimes uttered as trills, or "stuttered". Whistles also used as contact calls when not breeding.

Song:

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

Featherbase

CC

CC-sound:Espen Quinto-Ashman, Licence,Link.

CC-Photo:Helen Commandeur, Licence,Link.