Scottish Crossbill (Loxia scotica)
Grey-headed Woodpecker (Picus canus)
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.
Green back. Head mostly grey with only a slim black moustache stripe, and underparts rather greyish too. Smaller than Green Woodpecker, and bill less heavy. Male with small red patch on forehead. Flight and movements more agile than Green Woodpecker.
Sound:Mostly heard during the breeding season. Song similar to Green Woodpecker, but general tone is soft and melancholic. Phrases consists of series of 5-8 clear notes falling both in pitch and intensity, and with diagnostic ritardando at the end. Short "kek" uttered if excited. Rarely drums.
Song:
Distribution:
Wikipedia: map (se also Xeno-canto below)
Ecology:Birdlife ecology
Links:
Observation.org Latest observations
Image search Flickr NB! May give other species
CC