m, 119

---- of anger, 119

---- of recognition, 139

---- of warning, 119, 139, 141, 145, 151, 153

Offspring, rearing of, 3, 4

Organic change, sexual, 92, 123

---- changes, 65

---- condition of Reeve, 173

Owl, Wood, 156

Paired for life, 55-56

Parental instinctive response, failure of, 185

Partridge, 87, 218

Persecution, Carrion Crow and Magpie, 226

Persecution, Carrion Crow and Rook, 227

---- House Sparrow and Martin, 218

---- Lapwing and Snipe, 220

---- Raven and Buzzard, 217

---- ---- and Peregrine, 216

---- Starling and Woodpecker, 218, 237

Persistency to remain in territory, 68

Pied-Wagtail, 86, 155

Pigeon, Wood, 219

Pipit, Meadow, 188

---- Tree, 51, 188, 189, 222, 244, 278

Polyandrous females, 144

Predatory species, 268

Promiscuous pairing of Ruffs, 172

Proximity to food-supply necessary for rearing young, 179, 195

_Psychology, Manual of_, 1

Puffin, 63, 116, 200

Pugnacious instinct, 87-109

Pugnacity, 11, 62

---- of females to obtain mates, 109-118

---- of males, prior to mating-season, 77-81

---- of Moor-Hen, 218

Racial preparation, 41, 43, 46, 67, 205, 206, 266

Rail, Water, 218

Raven, 48, 202, 216

Razor-bill, 63, 64, 200, 247

Readjustment of territory, 146

Rearing of offspring, 3, 4

Red-backed Shrike, 39, 50, 51, 156

Redbreast, 47

Redshank, 139

Redwing, 124

Redstart, 230, 244

Reed-Bunting, 28, 68, 69, 85, 104, 132, 156, 158, 160, 244, 246, 273

Reed-Warbler, 49, 51, 68, 81, 132, 140, 152, 153, 211, 225

Reeve, 171

Relation of song to the territory, 119-68

---- of territory to migration, 259

---- of territory to the system of reproduction, 169-214

Relationship to a territory, 169

Reproduction, 14, 15

---- and territory, 169-214

---- attainment of, 2, 6, 37

---- goal of, 6

Ringed Guillemot, 64

Robbery of territory, 104-107

Rock-formation, suitability for Guillemots nesting on, 196

Rook, 202, 227

Routine behaviour, 262

Ruff, 54, 63, 172

---- meeting places for conflicts, 54

Ruffs, promiscuous pairing of, 172

Savi's Warbler, 139

Sedge-Warbler, 25, 44, 152, 226, 244

Selous, E., on the life-history of Ruffs and Reeves, 172

---- on meeting places for conflicts and antics, 54

---- on the meeting places of Black Grou