Rock Dove (Columba livia)
Pallid Swift (Apus pallidus)
Clearly smaller than Wood Pigeon. Plumage highly variable, and some morphs quite similar to Stock Dove. Differs from latter in complete dark wingbars on secondary coverts (not only inner coverts). Back light grey, contrasting with darker grey neck and head. Often with white patch at lower back, but not always. Underside of wings very pale, and dark trailing edge of tail fairly narrow. Lacks Wood Pigeon's white wing-patches. Feral Pigeon is the same species as Rock Dove. The existance of a population of pure wild Rock Doves without any mixed genes from feral populations anywhere in the world is debateable. There are many traits that can determine a bird as feral (like asymmetrical pigmentation), but birds with "classic" wild Rock Dove plumage also exists in the feral populations.
Sound:Not loud. Song a two-syllable, but continuous cooing. First a rolling ascending "orrrrrr" immediately followed by a short descending "oohh". Wings produce a quite audible whistling sound.
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
CCVery similar to Common Swift, and often difficult to identify in the field. Seeing the birds against a darker background, as opposed to the sky, brings out some of the characters more clearly. Generally paler and more sandy brown than Common Swift. Differs further from C. Swift by: Rounder wing tip (outermost primary shorter than the next), slightly broader wings, broader and flatter head. White throat patch bigger and more prominent. The face seems paler, which brings out the dark eye-mask. Back slightly darker than upper part of wings. More contrast between outer and inner primaries. Underparts with more pronounced scaly pattern. Flight less acrobatic, with slightly slower wing-beats, more frequent gliding and much less twinkling turns.
Sound:Similar to Common Swift, but usually very helpful for ID. Almost di-syllabic, with marked accent on second syllable which rapidly drops in pitch, "srrrree-aah". Common swift has a more even call, with accents on first part, without the sudden pitch-drop.
Contact call:
Distribution:
Xeno-canto: map
Ecology:Birdlife ecology
Links:
Observation.org Latest observations
Image search Flickr NB! May give other species
CCSound recording:Creative Commons,www.xeno-canto.org,Carlos W.,http://creativecommons.org/licenses/by-nc-sa/4.0/