. The birds of California : a complete, scientific and popular account of the 580 species and subspecies of birds found in the state. Birds; Birds. The White-throated Swift Egg deposition in the case of the White-throated Swift is not daily, as is customary with small birds, but only every second or third day, as determined by Mr. Wilson C. Hanna, of Colton. The White-throated Swift enjoys a great range in the nesting season, breeding from virtual sea-level up to nearly timberline. Their occupation of the gorges in the western Sierras is not less characteristic than that of the dobe cliffs of
. The birds of California : a complete, scientific and popular account of the 580 species and subspecies of birds found in the state. Birds; Birds. The White-throated Swift Egg deposition in the case of the White-throated Swift is not daily, as is customary with small birds, but only every second or third day, as determined by Mr. Wilson C. Hanna, of Colton. The White-throated Swift enjoys a great range in the nesting season, breeding from virtual sea-level up to nearly timberline. Their occupation of the gorges in the western Sierras is not less characteristic than that of the dobe cliffs of the coast ranges. In the latter instance they are humanly attainable, but those which elect to nest in the glacier-scored walls of Tehipite or the Yosemite are secure from mortal wish. The evolutions of these master aeronauts are an engaging feature of life at Glacier Point. The birds delight, I be- lieve, in "throwing scares" into tourists, and if one does happen to be squeamish about gazing into a 3000 foot abyss, it doesn't help matters any to have a saucy bird demonstrate the strength of his nerves by dashing within a foot of one's ears at a rate of five miles per minute, that is, 440 feet per sec- ond. A strong upcur- rent of air at this place takes up bits of paper from discarded lunch boxes and whirls them in the air at dizzying heights above the valley. Noting that the Swifts paused occasionally to inspect these bits of pa- per, I conceived the idea of feeding them smaller bits of tissue. There was instant attention on the part of the Swifts, and I soon had them seizing the paper before it had floated a dozen feet away. Many of the pieces were borne off in triumph out of sight, but I was not able to trace any of the birds to their nests by means of it. Indeed, I am not sure that the bits were not all eventually dis- 969. Taken in San Bernardino Photo by Pierce NEST AND EGGS OF WHITE-THROATED SWIFT NOT IN SITU. Please note that these images are extracted from s
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Photo credit: © Library Book Collection / Alamy / Afripics
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectbirds, bookyear1923
