Current Ornithology, Volume 7

Acorn adaptive adults American analysis Anim associated avian Balda behavior benefits birds Blem body breeding caches changes Chickadee clutch colonial communal compared composition Condor costs declines density depend distribution Ecology effect eggs energy estimates etal evolution example factors feeding females flocks forest groups Gulls habitat hoarding important increase individuals influence Island Lack larger less levels lipid major males mass mate mean method migrants migratory neotropical migrants nesting North Nutcracker observed occur organization pairs parental Parus patterns period population predators predictions Press probably production protein range region relationship relatively reproductive reserves result season seeds selection significant Smith social Sparrow species storage stored stored food structure studies success suggested Table territories tropical University Vander Wall variables variation Warbler Willow winter Woodpecker young Zool