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:

An almost featureless, large warbler with greyish brown upperparts and buff underparts. Lack of distinct characters is a character! Most distinct character is probably the faint, slate grey half-collar. Vent has no markings, eye is dark and bill is relatively short. Body quite plump, and facial expression gentle and mild. Usually stays hidden in foliage. Lacks nervous behaviour of other Sylvia, and does not normally flick its tail and wings.

Sound:

Song: a full bodied, flowing, melodious stream of notes, distinguished by its almost constant, warbled quality and lack of clear whistling notes (see Blackcap). Tempo is fairly even. Beware confusion possibility with occasional subsong of Blackcap that never reaches the whistling part! Call a nasal "che". Alarm call a hard "check", and a hoarse "tcherr".

Song:

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-photo:Billy Lindblom, Licence,Link,

CC-photo:themadbirdlady, Licence,Link.

CC-photo:Martha de Jong-Lantink, Licence,Link.