. Nature sketches in temperate America, a series of sketches and a popular account of insects, birds, and plants, treated from some aspects of their evolution and ecological relations . I have above intimated, about the first week in June, butthe exact time of incubating and hatching varies to a considera-able extent. On June 22, 1906, I found the average size ofthe young to be three-eighths of an inch in length. I never fully appreciated the value of the green color toyoung walking-sticks, and conversely, the use of the gray andbrown colors to the adults, until one day on examining thefoliage
. Nature sketches in temperate America, a series of sketches and a popular account of insects, birds, and plants, treated from some aspects of their evolution and ecological relations . I have above intimated, about the first week in June, butthe exact time of incubating and hatching varies to a considera-able extent. On June 22, 1906, I found the average size ofthe young to be three-eighths of an inch in length. I never fully appreciated the value of the green color toyoung walking-sticks, and conversely, the use of the gray andbrown colors to the adults, until one day on examining thefoliage of a sapling oak I happened to be in a position to lookdown upon a cluster of its rich green leaves. Here I observeda young, half-grown walking-stick astride one of the body was directly in line with the middle of the leaf, withhis head directed toward the stem. When I first discoveredhim his forelegs were, as usual, closed together alongside theslender antennae which projected forward. The leaves of thisoak were deep green, with the light pale green veins contrastingsomewhat conspicuously. The position of the insect was such PROTECTIVE RESEMBLANCE, WITH EXAMPLES 77. The Male Walking-stick {Diapheromera Jemorata). The charac-teristic attitude of protection is shown by the extension of theforelegs in front, one on each side of the slender antenna:. 78 NATURE SKETCHES IN TEMPERATE AMEfiICA that he stood over the veins, the legs being arranged almostparallel with them. From this view of his body, he was soclosely in accord with the veins that he was almost wondered at the time if this position was a mere coincidenceor was a common behavior. It is obvious that in this attitudeand at a little distance the young walking-stick may stand onthe upper surface of the leaves and defy the sharp-eyed birdsor other vertebrates to discover his attenuate form. While I found this resemblance of the walking-stick to thecentral and radiating veins of the oak and other leave
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbirds, booksubjectins
