236 APPENDIX, 
O1t GLANDS oF Birps, p. 213. 
In investigating the question of the use of the oil-glands 
in birds, I examined a large number of species for the pur- 
pose of ascertaining how these glands were distributed, some 
possessing only one, others two. In this I have been greatly 
assisted by Mr. Dunn, whose extensive opportunities as a 
collector have rendered his kind help extremely valuable. 
The following are the species examined: 
1. Those possessing one Gland. 
Griffon Vulture. 
Egyptian Vulture. 
Golden Eagle. 
Spotted Eagle. 
White-tailed Eagle. 
Osprey. 
Iceland Falcon. 
Peregrine Falcon. 
Hobby. 
Merlin. 
Red-footed Falcon. 
Kestrel. 
Goshawk. 
Sparrowhawk. 
Kite. 
Buzzard. 
Rough-legged Buzzard. 
Honey Buzzard. 
Marsh Harrier. 
Hen Harrier. 
Ashcoloured Harrier. 
Eagle Owl. 
Scops-Eared Owl. 
Long-Eared Owl. 
Short-Eared Owl. 
Barn Owl. 
Tawny Owl. 
Snowy Owl. 
Hawk Owl. 
Little Owl. 
Great Grey Shrike. 
Red-backed Shrike. 
Woodchat Shrike. 
Fieldfare. 
Song Thrush. 
Rock Thrush. 
Redwing. 
Blackbird. 
Ring Ousel, 
Golden Oriole. 
Alpine Accentor. 
Hedge Sparrow. 
Redbreast. 
Blue-throated Warbler. 
Redstart. 
Black Redstart. 
Wheatear. 
Great Sedge Warbler. 
a a 
