INDEX
307
- Sexual instinct in the migratory male, 26
- —of Reeve, 173
- ——reawakening of, 4, 18
- —life of birds, 1
- —maturity, males arrive at, before females, 36
- —organic change, 92, 123
- —selection, 166
- Shag, 121
- Shrike, Red-backed, 39, 50, 51, 156
- Skylark, 188, 236, 244
- Snipe, 153, 156, 219, 220
- Sociability when not paired, 125, 126
- Song, as an aid in searching for a mate, 12
- —its influence on mating, 167
- —origin of, 138
- —relation to reproduction, 123
- —relation to territory, 119-168
- —volume of, influenced by age, seasonal sexual development, or isolation, 166
- Song-Thrush, 222, 244
- Sparrow, House, 218
- Sparrow-Hawk, 269
- Spring, at approach of, birds loose their shyness, 138
- Stability of the water and mobility of the land, 260
- Starling, 217, 218, 237, 251
- Stimulation, internal, 62, 123
- question of, 284
- Stonechat, 87 187, 188, 189, 222, 233, 234
- Stout, Dr, Manual of Psychology, 1, 77
- Struggle for existence, 294
- Susceptibility to position, 96
- Swallow, 21, 156, 278
- Territory, 1, 5
- —adjustment of, 10
- Territory and reproduction, 169-214
- —breeding, 2, 3, 7
- —dates of acquisition of, 33
- —defence of, 6
- —desertion of, after rearing young, 276
- —disposition to defend, 73-118
- —disposition to secure, 6, 20-72
- —establishment of, 74, 285
- —evolution of, 176
- —failure to secure, 286
- —fights for, 10, 11, 13, 62
- —ownership of, 189
- —possession of, a stimulus to song, 136
- —its relation to migration, 259
- —its relation to reproduction, 169-214
- —readjustment of, 147
- —restriction of, advantageous for mating, 172
- —restricted, 8, 9, 30, 50, 58, 64
- —separate for male and female Cuckoo, 144
- —song, its relation to the, 119-68
- —temporary desertion of, 28, 35, 58, 59
- —and hostility, relationship between, 242
- Thrush, Song, 222, 244
- Tit, Blue, 221, 226
- —Great, 221
- —Long-tailed, 226
- Tradition, 300
- Tree-Pipit, 51, 188, 189, 222, 232, 244, 278
- Turtle-Dove, 126, 232
- Union of sexes, 12
- Ussher, H. B., on the hostility between Choughs and Hooded Crows and Choughs and Ravens, 227
