236 



APPENDIX. 



OIL GLANDS OF BIRDS, 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 1 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. 



Bed-backed Shrike. s 



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. 



