By Lars Svensson
"Collins chicken consultant" presents the entire info had to determine any species at any time of the 12 months, with distinct textual content on dimension, habitat, diversity, identity and voice. Accompanying each species access is a distribution map and illustrations displaying the species in all of the significant plumages (male, lady, immature, in flight, at relaxation, feeding).
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Extra resources for Collins Bird Guide
0' TUFTED DUCK sometimes white undertail black back some show extensive white like Scaup(but note bill pattern) hint of tuft invariably tufted uniform dark "' brown duller brown than ad. Q ad. Q winter hint of pale band broad black tip 1- "' juv. ad. d eclipse ad. 0' RING-NECKED DUCK compare with Q Pochard (upper) • 0' Ring-necked (2nd from right) asleep among Tufted Ducks pale band faint or lacking head shape distinctive in all plumages / peaked hindcrown 1st-wiriter 0' \ juv. / KM ad. 0' eclipse prominent!
Differs subtly from Velvet in shape of bill and head, and outline of feathering, but identification difficu lt and requires close range. Canvasback Ayrhya valisineria v*** L 49- 56 em. NAmerican species. Very rare vagrant to Europe (Britain, Iceland, Netherlands). IDENTIFICATION Compared with Pochard, adult <:J breeding can be picked out through its larger size and paler body (silky white; Pochard: pale grey), but the all-dark and longer bill with auemwted,fine tip is also striking. Chestnut brown head often swarthy around bill-base and back towards eye.
Has hybridized with White-headed Duck in Spain (this posing a serious conservation problem). Breeds on shallow, eutrophic lakes. IDENTIFICATION Small and compact, with large head, strong bill, rounded body and long, stiff tail, often cocked. -d': In s~ring, body largely deep chestnut, crown (down to eye) a~d hmdneck black, cheeks, chin and undertail-coverts white. Btll pale blue. In winter, bill is grey and body dull brown, but . white cheeks retained. --~ able) dark horizontal stnpe ' across cheeks.