Scottish Crossbill (Loxia scotica)
Dunnock (Prunella modularis)
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
Image search Flickr NB! May give other species
CCCollage 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.
Sparrow-sized, brown and streaked passerine with slate-grey head and chest. Bill thin and warbler-like, head rounded. Narrow, pale wing-bars. Often forages on ground in a crouched manner, creeping or hopping with legs almost hidden. Flicks wings and tail when restless. Secretive behaviour, except when visiting feeders and when singing from tree tops.
Sound:Contact call a dry, thick trill "trrr", and a short King Fisher-like, high-pitched "zeep". Song a fast and evenly paced, high pitched stream of clear notes. No consistent phrasing. Similar in timbre to Robin, but does not vary tempo or pitch nearly as much. Often compared to the sound of a squeaky wheelbarrow.
Song:
Distribution:
Xeno-canto: map
Ecology:Birdlife ecology
Links:
Observation.org Latest observations
Image search Flickr NB! May give other species
CC