Data from: A quantitative test of the predicted relationship between countershading and lighting environment.
- Allen, William Laurence
- Endocrinology: androgens Endocrinology: behavioral Evolution: social salamanders Anurans (frogs and toads) Reptile crocodilians lizards snakes turtles
- by measuring illumination falling onto a model ruminant as a function of time of day and lighting environment. Calibrated images of 114 species of ruminant wer