共 20 条
- [1] AUSTIN OL, 1968, US NAT MUS B, V237
- [2] THE COMPARATIVE FEEDING RATES OF NORTH-AMERICAN SPARROWS AND FINCHES [J]. ECOLOGY, 1988, 69 (04) : 1195 - 1199
- [3] BENKMAN CW, 1987, WILSON BULL, V99, P351
- [4] FOOD PROFITABILITY AND THE FORAGING ECOLOGY OF CROSSBILLS [J]. ECOLOGICAL MONOGRAPHS, 1987, 57 (03) : 251 - 267
- [5] ON THE ADVANTAGES OF CROSSED MANDIBLES - AN EXPERIMENTAL APPROACH [J]. IBIS, 1988, 130 (02) : 288 - 293
- [6] SYNCHRONOUS ERUPTIONS OF BOREAL SEED-EATING BIRDS [J]. AMERICAN NATURALIST, 1976, 110 (974) : 559 - 571
- [7] ERIKSSON K, 1970, Annales Zoologici Fennici, V7, P273
- [9] Martin A. C, 1951, AM WILDLIFE PLANTS
- [10] NETHERSOLETHOMP.D, 1975, PINE CROSSBILLS SCOT