Observations on a nesting of the Black-throated Blue Warbler

TitleObservations on a nesting of the Black-throated Blue Warbler
Publication TypeJournal Article
Year of Publication1958
AuthorsFreer MF
JournalJack Pine Warbler

1. At UMBS, Cheboygan County, Michigan, a nest of the Black-throated Blue Warbler was located on July9. Presumably it was a second attempt at nesting. 2. The nest was located in an open area of hardwoods with bracken-ferm the predominant ground vegetation, and in this the nest was placed two feet from the ground. 3. Three eggs were laid on July 10, 11, and 12. On July 13 only one of the three eggs was still in the nest. The other two were found on the ground below the nest. 4. Only the female incubated; the male did not approach the nest. 5. On the twelfth day of incubation, which is the usual hatching time, the female twice brought food to the nest, although hatching had not occurred. 6. The period of attentiveness of the female continued throughout incubation without excessive variation until she finally deserted on July 31. Data on incubation are presented in Table 1. 7. The male was last heard singing on July 24, the thirteenth day of incubation.