Newbigin, Marion I. (Marion Isabel), 1869-1934 · London, J. Murray · leaf 292
THE COLOURS OF BIRDS 277 XIII modification seen in the sun-birds where the metallic barbules are entirely unconnected. We can thus understand how it is that the quills of humming¬ birds may display structural colour without their efficiency being in any way impaired. The fact is also readily… … a b Fig. 4. — Metallic barbs from feathers of humming-birds, magnified, a is from a feather belonging to a female of Eustepha.7ius fernandensis, the barbules at the base are metallic, but the barb also bears rudiments of barbules at its tip. b, a barb from the feather shown in Fig. 3 ; all the…
Animals -- Color · Plants -- Color
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
