quality:correction, structural:expansion, stylistic:tone
Banding experiment with eastern phoebes

In volume 2 of Ornithological Biography (1834), Audubon told a story from his childhood, 30 years after the events reportedly took place, that has since garnered him the label of "first bird bander in America". The story has since been exposed as likely apocryphal. In the spring of 1804, according to the story, Audubon discovered a nest of the "Pewee Flycatcher", now known as the eastern phoebe (Sayornis phoebe), in a small grotto on the property of Mill Grove. To determine whether the other phoebes on the property were "descended from the same stock", Audubon (1834:126) said that he tied silver threads to the legs of five nestlings:

I took the whole family out, and blew off the exuviae of the feathers from the nest. I attached light threads to their legs: these they invariably removed, either with their bills, or with the assistance of their parents. I renewed them, however, until I found the little fellows habituated to them; and at last, when they were about to leave the nest, I fixed a light silver thread to the leg of each, loose enough not to hurt the part, but so fastened that no exertions of theirs could remove it.

He also said that he had "ample proof afterwards that the brood of young Pewees, raised in the cave, returned the following spring, and established themselves farther up on the creek, and among the outhouses in the neighbourhood … having caught several of these birds on the nest, had the pleasure of finding that two of them had the little ring on the leg." However, multiple independent primary sources (including original, dated drawings of European species) demonstrate that Audubon was in France during the spring of 1805, not in Pennsylvania as he later claimed. Furthermore, Audubon's claim to have re-sighted 2 out of 5 of the banded phoebes as adults (i.e., a 40% rate of natal philopatry) has not been replicated by modern studies with much larger sample sizes (e.g., 1.6% rate among 549 nestlings banded; and 1.3% rate among 217 nestlings banded). These facts cast doubt on the truth of Audubon's story.