2 
1‘AGE 
Ethology = 5819 : — 
General and Miscellaneous 
. . 
42 
Food habits 
m # 
42 
Migration, General Problems . . 
. . 
. . 
43 
,, Regional Observations 
. . 
, , 
43 
„ Migration of Single Species or Groups 
• . 
43 
„ Bird-marking experiments and results 
. . 
43 
Flight 
43 
Parental relations 
, , 
43 
Sexual relations and display 
, # 
43 
Nidification, General Problems . . 
43 
„ Regional Observations 
. . 
43 
,, Observations on single species 
. . 
43 
Voice 
. . 
44 
Psychology 
44 
Colour and Moult. . 
. . 
44 
Pathology 
44 
Avian Parasitology 
44 
Mortality . . 
44 
Variation and Aetiology = 5828: — 
Variation . . 
44 
Teratology ... 
44 
Hybrids .. .. V. 
44 
Heredity and Evolution 
44 
Fossil and Extinct birds . 
44 
Geography = 5827 : — 
Palaearctic Region 
Ethiopian Region 
Indian Region 
Australian Region 
Neotropical Region 
Nearctic Region . . 
The Oceans 
III . Systematic : — 
Struthioniformes . . . . . . . . . . . . 49 
Dinornithi formes . • . . . . . . . . . . 50 
Apterygiformes . . . . . . . . . . 50 
Tinamiformes . . . . . . . . . . . . 50 
Galliformes .. .. .. .. .. ..50 
Pteroclidiformes . . . . . . • . . . . 51 
Oolumbiformes . . . . . . . . . 51 
Opisthocomiformes . . . . . . . . 52 
Ralliformes . . . . . . . . . . 52 
Podicipediforines . . . . . . . . . . . . 52 
Colymbi formes .. .. .. .. .. ..52 
Sphenisciformes . . . . . . , . . . 52 
Procellariiformes . . . . „ . . . .... 52 
46 
47 
47 
48 
48 
49 
