| Literature DB >> 16591777 |
W B Watt1.
Abstract
The butterfly Colias eurytheme requires body temperatures above 30 degrees C for flight. When cold, it orients its exposed wing undersides to present maximum surface area to sunlight; when too warm, it orients for minimum exposure. Dark-winged color forms heat faster in sunlight than light ones. The seasonal color polymorphism of Colias appears to have been evolved to maximize solar heating in cold seasons and minimize overheating in warm seasons.Entities:
Year: 1969 PMID: 16591777 PMCID: PMC223518 DOI: 10.1073/pnas.63.3.767
Source DB: PubMed Journal: Proc Natl Acad Sci U S A ISSN: 0027-8424 Impact factor: 11.205