Bird lore (1907) (14753273224) - Public domain zoological illustration
Summary
Identifier: birdlore91907nati (find matches)
Title: Bird lore
Year: 1899 (1890s)
Authors: National Committee of the Audubon Societies of America National Association of Audubon Societies for the Protection of Wild Birds and Animals National Audubon Society
Subjects: Birds Birds Ornithology
Publisher: New York City : Macmillan Co.
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Biodiversity Heritage Library
Text Appearing Before Image:
his bird has its nesting haunts at the very edge of the Gulf States and upward, as far north as Manitoba and Nova Scotia. When the breeding season is over, the birds travel sometimes in family groups and sometimes in large flocks, moving southward little by little, according to season and food-supply, some journeying as far as Mexico, others lingering through the middle and southern states. The Bluebirds that live in our orchards in summer are very unlikely to be those that we see in the same place in winter days. Next to the breeding impulse, the migrating instinct seems to be the strongest factor in bird life. When the life of the home is over. Nature whispers, To wing, up and on! So a few of the Bluebirds who have nested in Massachusetts may be those who linger in New Jersey, while those whose breeding haunts were in Nova Scotia drift downward to fill their places in Massachusetts. But the great mass of even those birds we call winter residents go to the more southern parts of (48)
Text Appearing After Image:
✌️-j# Upper Figures—CHESTNUT-BACKED BLUEBIRD Order—Passeres Family—TurdiD/B Genus—Sialia Species—Mexicana Subspecies—Bairdi Lower Figures—BLUEBIRDSOrder—Passeres Family—TurdidvE Genus—Sialia Species—Sialis The Bluebird 49 their range every winter, those who do not being but a handful in com-parison. What does this great downward journey of autumn mean? you ask.What is the necessity for migration among a class of birds that are able tofind food in fully half of their annual range? Why do birHs seek extremesior nesting sites? This is a question about which the wise men have manytheories, but they are still groping. One theory is that once the wholecountry had a more even climate and that many species of birds lived all theyear in places that are now unsuitable for a permanent residence. There-iore, the home instinct being so strong, though they were driven from theirnesting sites by scarcity of food and stress of weather, their instinct led themback as soon as the
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