Yellow Hammer, [584]

Yellowshank, [283] f.

Yelper, [278]

Young, moult late, [4];

in Turdinae and Sylviinae, [513];

of Megapodiidae fly early, [191]

Zanclostomus, [351]

Zapornia, [246];

Z. parva, [246], [248]

Zebrilus, [86], [87];