On May 28 this year, I wrote about finding an easily visible Blue-gray Gnatcatcher nest in Eliza Howell Park and concluded my comments this way:
“One of my goals each year for the June Detroit Audubon-sponsored field trip to Eliza Howell Park is to be able to point out an active Blue-gray Gnatcatcher nest, even if I cannot expect others to be quite as enthusiastic as I am about this tiny bird and its fascinating nest.”
The field trip took place on June 8, which, according to my estimate based on observed behavior, was about day 10 of incubation (of a normal 11 – 15 day incubation period). When the our whole group stopped to look, the bird remained on the nest, watching us but not threatened enough by our presence to leave. Melissa Francese took this picture at that time.
A few days later the eggs hatched. By June 18, when Kevin Murphy took the next two photos, the young were nearing the end of their in-nest development.
It is difficult to tell because they were constantly moving, but my various efforts to count heads led me to conclude that there were probably 4 nestlings. While the female does most of the incubating, both female and male feed the young.
They are now gone from the nest, successfully fledged as far as I can tell. While Blue-gray Gnatcatchers occasionally brood twice in a year, my nest watching of this species is likely over for the year.
They are nearly halfway through their stay of 4 + months in Detroit (arrive in late April and depart in September), spending the majority of their year far to the south. (Range map from Cornel Lab of Ornithology).
I will continue to see them foraging in the park for a couple months (photo by Margaret Weber).
And each time I see one, I will feel a sense of appreciation for weeks of enjoyable nest watching this year and for a highlight of the 2019 June Audubon field trip.