Sooty, dusky birds seen on the wing, never resting except in chimneys of houses, or hollow trees, where they nest. Tips of tail feathers with sharp spines, used as props. They show their kinship with the goatsuckers in their nocturnal as well as diurnal habits, their small bills and large mouths for catching insects on the wing, and their weak feet. Gregarious, especially at the nesting season. Chimney Swift.英文原著 · 《Bird Neighbors》
AIANASEINE, MARIYA. Sleep, its physiology, pathology, hygiene and psy- chology. London, 1908.
MARSH, H. The Diurnal Course of Efficiency. Y., 1906. MERCIER, CHARLES A. Psychology, normal and morbid.英文原著 · 《Criminal Psychology》
Our postulate of origin through selection also enables us to understand why the leaf-imitation is on the lower surface of the wing in the diurnal Lepidoptera, and on the upper surface in the nocturnal forms, corresponding to the attitude of the wings in the resting position of the two groups.英文原著 · 《Darwin and Modern Science》
It is true that this explanation of the bright, conspicuous colours is only a hypothesis, but its foundations,--unpalatableness, and the liability of other butterflies to be eaten,--are certain, and its consequences--the existence of mimetic palatable forms--confirm it in the most convincing manner. Of the many cases now known I select one, which is especially remarkable, and which has been thoroughly investigated, Papilio dardanus (merope), a large, beautiful, diurnal butterfly which ranges from Abyssinia throughout the whole of Africa to the south coast of Cape Colony.英文原著 · 《Darwin and Modern Science》
He must mean either the heliacal or achronical rising of that sign. The heliacal rising of a constellation is when it comes from under the rays of the sun, and begins to appear before daylight. The achronical rising, on the contrary, is when it appears at the close of day, and in opposition of the sun's diurnal course. The heliacal rising of Orion is at present computed to be about the 6th of July; and about that time it is that he either causes or presages tempests on the seas.英文原著 · 《Discourses on Satire and Epic Poetry》