May seems to be a big month for fledglings here in Central Texas. Lots of young birds have just left the nest and are learning to fly and catch food on their own, always under the watchful eye of their parents. They're basically the bird equivalent of a teenager. You can tell a fledglings because they're as big as an adult bird, but may be "scruffy" looking because they haven't gotten all their adult feathers in yet, and they may have slightly different, usually duller colors and patterns compared to an adult bird. They're also usually accompanied by their busy parents, still begging the parents for food with whiny chirping and wing-fluttering.
They also tend to act dumber than adult birds, and are easier to get close to and don't fly as well. It's a dangerous time in a bird's life. Often the parents will try to make up for this by being extra aggressive with alarm calls, and even swooping at you to get them away from their kids.
There was also a fledgling mockingbird around, but when I tried to get its picture, Mom and Dad were all, "Oh no you don't!" and quickly lurked Junior away while making angry alarm calls and swooping at me. Blue jays and mockingbirds are two birds species you really don't want to mess with.