MARECA. 191 
158. POLIONETTA ZONORHYNCHA (Swinhoe). 
ZONE-BILLED DUCK. 
' Anas zonorhyncha SwINHOE, Ibis (1866), 394; Satvapori, Cat. Birds Brit. 
Mus. (1895), 27, 211. 
Polionetta zonorhyncha SHARPE, Hand-List (1899), 1, 217; McGregor and 
Worcester, Hand-List (1906), 37. 
Calayan (McGregor). Eastern Siberia, Mongolia, China, Japan, Kurile Islands. 
“Adult male-——Upper part of head and a broad stripe from lores 
through eyes to some distance behind them dark brown; superciliary 
stripe, sides of head, and throat whitish; from gape toward eyes a 
slightly indicated dusky band, formed by dusky streaks; upper parts 
brown, back and scapulars paler, with edges of feathers pale grayish; 
rump and upper tail-feathers uniform dark brown; lower part of fore 
neck and upper breast dull whitish buff, with centers of the feathers 
dusky ; lower breast and abdomen almost uniform brown, deepening into 
black-brown on under tail-coverts; wings brown; speculum glossy blue, 
more or less with a green luster, bordered anteriorly and posteriorly by 
two velvety black bands; tips of the secondaries narrowly edged with 
white; tertials brown, with only the apical part of outer web white; tail 
brown, the edges of the feathers whitish. ‘Bill black, with the apical 
portion, except the tip of the nail, yellow, no red spots at base; feet light 
bright red, the web slightly dusky; iris yellowish brown. (Holst.) 
Length, about 580; wing, 295; tail, 117; culmen, 56; tarsus, 44. 
“Female-—Smaller and paler, the feathers of the breast for a greater 
extension than in the male having broader whitish edges. 
“Young.—Paler even than the female, with smaller dusky spots on the 
under parts; edges of upper wing-coverts pale; a broad subapical white 
band across the greater wing-coverts, and the outer web of tertials for the 
most part white.” (Salvadori.) 
On December 7, 1903, a dozen birds of this species were observed in 
Calayan. A female, the only specimen killed, measured 560 in length; 
wing, 267; tail, 99; exposed culmen, 53; bill from nostril, 42; tarsus, 44; 
middle toe with claw, 37. Bill jet-black with a broad tip of bright yellow; 
most of the nail black; iris tan-brown; legs and feet light salmon; nails 
black; webs dusky. 
Genus MARECA Stephens, 1824. 
Bill small, shorter than head, depressed and slightly narrowing toward 
tip, nail large; wings long and pointed. 
