Scottish Crossbill (Loxia scotica)
Kestrel (Falco tinnunculus)
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.
Medium sized falcon with long tail and long wings. Upperparts brick-red, underparts pale buff with dark speckles. Male; light grey head and tail. Female; brick-red head and tail. Both sexes with broad, black terminal tail-band visible on both sides. Evident, but diffuse moustache-stripe. Hovers more frequently than other raptors. Tail and wings gives a more rounded impression when soaring. Very similar to Lesser Kestrel.
Sound:Most common call a fast series of short, high-pitched "ke-ke-ke". Much less raucous than Merlin or Peregrine.
Call:
Distribution:
Xeno-canto: map
Ecology:Birdlife ecology
Links:
Observation.org Latest observations
Image search Flickr NB! May give other species
CCSounds:Recorded by Francesco Sottile,http://www.xeno-canto.org ,CC license