Page:Territory in Bird Life by Henry Eliot Howard (London, John Murray edition).djvu/372

304 Females, fighting amongst, 109-118

— sexual impulse of, 13

Fieldfare, 124

Fighting instinct, 79, 82

Flight, emotional behaviour of Godwit during, 53

Flocks, in winter, birds collect together in, 262

Flycatcher, 244

Food, procuring of, 5

— abundance, or scarcity of, its relation to prosperity of young, 15, 16

— its bearing, on the movement of flocks, 262

— rearing of young dependent on rapid and regular, 179, 195

— supply, proximity to, necessary for rearing young, 179, 195

Fortuitous mating, 174

Fowler, Ward, on the value of communities, Books, 202

Fulmar, 121, 247

Functional activity, 259

— instinct of Reeve, 173

Functioning of the disposition, 275

— of the primary dispositions, 100

Warbler, 223, 225, 230

Gätke, H., Birds of Heligoland, 24

— on the absence of song in birds on Heligoland, 124

— on the early arrival of Guillemots on Heligoland, 64

Godwit, emotional behaviour of, during flight, 53

— Black-tailed, 53

Grasshopper Warbler, 39, 131, 139, 153, 155, 187, 244

Greenfinch, 28, 33, 140, 235,236

Gregarious instinct, 20, 61, 141, 265-66, 269, 276, 289,

290, 291, 296, 300

Grouse, Black, 63

Guillemot, Bridled, 64

— Common, 63, 64, 121, 192, 195, 206, 211, 247

— Ringed, 64

Gull, Common, 119

— Herring, 210, 278

formation, law of, 8, 62, 65, 66, 67, 205

Hawfinch, 28

Headquarters, 176, 206, 207, 274

— restricted, 8, 9,-30, 50, 58, 64, 127

Hedge-Sparrow, 213, 221, 244

Hereditary equipment, 6

Herring-Gull, 210, 278

Hooded-Crow, 202

Hostility and territory, relationship between, 242

House-Sparrow, 218

, vocal, powers of, 156, 157, 161

Impulse, internal, 279

— to brood, 191

Inherited disposition, 5

Instinct, fighting, 79-82

— gregarious, 20, 61, 141, 265, 266,1269, 276, 289, 290, 291, 296, 300

— migratory, 37

— of song related to establishment of territory, 125

— sexual, reawakening of, 4, 18

Instinctive response, 180

Instincts susceptible to stimulation, 259

Internal impulse, 279