Tree Swallow (Tachycineta bicolor) Feeding its Fledglings
For the two summers we lived in Fremont, a pair of tree swallows set up a nest in a pipe. The pipe happened to be across from our kitchen window. We were able to watch the pair nest, the female brood, and then both adults feed the young.
We never saw the young leave the nest, they just disappeared one day.
I took this by setting up my camera on a tripod and getting focus and exposure set. The bird flew by every ten minutes or so, and the nestlings gave a warning by getting more agitated as the parent approached. The camera was set to burst, so it would capture a few frames.
Cornell Lab of Ornithology page on tree swallows.
Wikipedia article about tree swallows
Animal Diversity Web on Tree Swallows
If you search on "tree swallow swarm" on YouTube, you can find several videos of varying quality of flocks preparing for night roosts in their winter feeding grounds. Here's one.