Zöology; a textbook for colleges and universities . From Animate Creation FIG. 103. Milkweed butterfly (Danaus archippus). 2QO ZOOLOGY Warningcoloration. Photograph by J. H. Watson FIG. 104. Grifllsia Isabella on pine. This moth, which is found only in a limitedarea in Spain, and is named after Queen Isabella, is of a delicate pea-green color,the veins broadly covered with dark red scales. On the pine tree (Pinus maritima),on which it feeds, its colors produce an effect similar to that of the pine needles. rests that it is extremely hard to detect it. Some mothsand caterpillars, however, are v
Zöology; a textbook for colleges and universities . From Animate Creation FIG. 103. Milkweed butterfly (Danaus archippus). 2QO ZOOLOGY Warningcoloration. Photograph by J. H. Watson FIG. 104. Grifllsia Isabella on pine. This moth, which is found only in a limitedarea in Spain, and is named after Queen Isabella, is of a delicate pea-green color,the veins broadly covered with dark red scales. On the pine tree (Pinus maritima),on which it feeds, its colors produce an effect similar to that of the pine needles. rests that it is extremely hard to detect it. Some mothsand caterpillars, however, are very conspicuous. Manyyears ago the naturalist Bates wrote to Darwin, callinghis attention to an extremely gaudy tropical cater-pillar of large size, ornamented with red, yellow, andblack. How can such colors be of any advantage, itwas asked ? Must they not betray the larvae to everypassing bird ? Darwin, puzzled, wrote to Wallace, whosuggested that perhaps the caterpillars were distaste-ful to birds, and if so, the more easily they could berecognized the better chance they would have ofavoiding the fatal experimental peck. This has sincebeen shown
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectzoology, bookyear1920
