. Our common cuckoo and other cuckoos and parasitical birds [microform] : an attempt to reach a true theory of them by comparative study of habit and function; with a thorough criticism and exposure of Darwin's views and Romanes's views and those of their followers. Cuckoos; Birds; Coucous; Oiseaux. Cases Uucxplniiietl. 77 bird was a sparrow-hawk, a species that is sometimes mistaken for the ;' ]^ut in tlie case of a bird where the migratory in- stinct is so strong, and in any case where this instinct failed to act, some reason must be found in the ex- ceptional physical condition
. Our common cuckoo and other cuckoos and parasitical birds [microform] : an attempt to reach a true theory of them by comparative study of habit and function; with a thorough criticism and exposure of Darwin's views and Romanes's views and those of their followers. Cuckoos; Birds; Coucous; Oiseaux. Cases Uucxplniiietl. 77 bird was a sparrow-hawk, a species that is sometimes mistaken for the ;' ]^ut in tlie case of a bird where the migratory in- stinct is so strong, and in any case where this instinct failed to act, some reason must be found in the ex- ceptional physical condition of the bird which led it to brave the rigours of winter here instead of to attempt migration—some defect of wing feathers or power of flight. The food element is in all such (piestions a most important one. This would account for what we are constantly hearing of the cries of cuckoos at dates so early that no ornithologist can believe that cuckoos had then returned from migration. Other cases there are an- alogous and at present wholly unexplained. There is, for example, that of the corncrake, or landrail, where, considering the defect of wing-strength, the persistent migration is wonderful, and the instinct to it is as powerful in view of its drawbacks as in any bird ; yet in many districts landrails remain and skulk about here through the winter, and of this we know a case the year before last in Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Japp, Alexander H. (Alexander Hay), 1839-1905; Darwin, Charles, 1809-1882; Romanes, George John, 1848-1894. London : T. Burleigh
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbirds, booksubjectois
