File:The Audubon annual bulletin (1916) (20161722258).jpg

Title: The Audubon annual bulletin
Identifier: audubonannualb191623illi (find matches)
Year: 1938 (1930s)
Authors: Illinois Audubon Society
Subjects: Birds; Birds
Publisher: (Chicago, Ill. ) : The Society
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Biodiversity Heritage Library

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14 THE AUDUBON BULLETIN Inasmuch as the data concerning brown thrasher nests was more easily obtained, the following statistics are of more significance than those con- cerning the robin. Of the thirty nests, three were destroyed during the egg-laying period, one before any eggs were deposited in it and the other after two eggs had been laid. In these nests there were seventy-three eggs, fifty of which hatched, forty-three young birds successfully leaving the nest. MOURNING DOVE Of the twenty-nine mourning dove nests found on the campus, five were destroyed before any eggs were placed in them. Two eggs were found in each of twenty-two of the remaining twenty-four nests. In the other two nests there was one egg each. The first date on which a nest was found with eggs in it was April 20, and the last date was July 20. There was a wide range as regards the nesting site. Two nests were on the ground, some were on horizontal limbs of trees, some were in crotches of trees, some were platforms placed on many fine twigs, and two were built in deserted robin nests. The writer has seen mourning dove nests in deserted bronzed grackle nests and one in a deserted brown thrasher nest. Judging from the nests of this species on the campus, the mourning dove seems not yet to have found out the meaning of nest sanitation. Of the forty-six eggs laid in the nests, thirty- seven were destroyed before they hatched and of the nine hatched, one died before it was old enough to leave the nest. CATBIRD From the point of view of successfully rearing the young to the age of being old enough to leave the nest, catbirds seem better fitted to our campus environment than either of the above species. These birds were found
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