What to look for: Young hummingbirds are not smaller than the adults. One of the best signs that young have fledged is a noticeable increase of birds competing for feeders.
Look for these behaviors and physical characteristics to help identify a young hummingbird:
* Both male and female young have a white throat similar to the adult female
* You MAY notice light striping on the throat of young male hummers
* Look for white tips on the 3 outer tail feathers - visible best when tail is spread. Here's the tough part: the adult female has them too.
* The young will look plump and well-fed, sometimes even looking larger than the adult female
* Plumage will be clean and in nice shape; adult female may look a bit worse-for-the-wear
Don't feel bad if you can't tell them apart - it's not easy!