J R Downhower. Show Affiliations »
Abstract
Mesh: See more » AnimalsBiological EvolutionBirds/anatomy & histologyBirds/physiologyBody WeightDietEcuadorEnergy MetabolismFemaleMaleReproductionSeasonsSex CharacteristicsSpecies SpecificityWeather
Year: 1976 PMID: 980103 DOI: 10.1038/263558a0
Source DB: PubMed Journal: Nature ISSN: 0028-0836 Impact factor: 49.962