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2. Great tit fat reserves: effects of changing and unpredictable feeding day length;Bednekoff;Funct. Ecol.,1995
3. The white-crowned sparrow (Zonotrichia leucophrys) of the Pacific seaboard: environment and annual cycle;Blanchard;Univ. Californ. Publ. Zool.,1941
4. Food supplementation experiments with terrestrial vertebrates: patterns, problems, and the future;Boutin;Can. J. Zool.,1990
5. Timing of breeding and clutch size in the Florida scrub-jay, Aphelocoma coerulescens;Bowman;Ostrich,1998