A critical season approach to Allen's rule: bill size declines with winter temperature in a cold temperate environment

Climate, ecological release and bill dimorphism in an island songbird

(2013) R. Greenberg et al.   Biology Letters

Seasonal dimorphism in the horny bills of sparrows

(2013) Russell Greenberg et al.   Ecology and Evolution

THE INFLUENCE OF THE CALIFORNIA MARINE LAYER ON BILL SIZE IN A GENERALIST SONGBIRD

(2012) Russell Greenberg et al.   EVOLUTION

Heat Loss May Explain Bill Size Differences between Birds Occupying Different Habitats

(2012) Russell Greenberg et al.   PLoS One

High summer temperature explains bill size variation in salt marsh sparrows

(2011) Russell Greenberg et al.   ECOGRAPHY

Ecogeographic Patterns of Morphological Variation in Elepaios (Chasiempisspp.): Bergmann's, Allen's, and Gloger's Rules in a Microcosm

(2011) Eric A. VanderWerf   ORNITHOLOGICAL MONOGRAPHS

Geographical Variation in Bill Size across Bird Species Provides Evidence for Allen’s Rule

(2010) Matthew R. E. Symonds et al.   AMERICAN NATURALIST

A brief guide to model selection, multimodel inference and model averaging in behavioural ecology using Akaike’s information criterion

(2010) Matthew R. E. Symonds et al.   BEHAVIORAL ECOLOGY AND SOCIOBIOLOGY

Heat Exchange from the Toucan Bill Reveals a Controllable Vascular Thermal Radiator

(2009) Glenn J. Tattersall et al.   SCIENCE

Body temperature depression and peripheral heat loss accompany the metabolic and ventilatory responses to hypoxia in low and high altitude birds

(2008) G. R. Scott et al.   JOURNAL OF EXPERIMENTAL BIOLOGY