Responses of Body Mass, Organ Masses, and Metabolic Rates in Winter-Phenotype House Sparrows to Fluctuating Cold Temperatures.

Abstract excerpt

AbstractSmall birds in temperate regions are faced with a large range of environmental conditions throughout the year, including fluctuating temperatures. During cold winters, birds often exhibit an increase in metabolic rates, body mass, and pectoralis muscle mass because of the heightened energetic needs of thermoregulation. However, climate change is altering weather patterns, and in addition to widespread...

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