Good catch, Courtney.
There is a very small pond in a corner of our neighborhood park. It comes complete with a 'warming house' for ice skaters. In summer the pond is a scummy haven for insects, attracting barn swallows that nest in the rafters...
You can look for bird poop to see where the nests are
See the little guy just about filling up the nest? The parents are friendly and make no attempt to dive bomb people; they just perch and watch. 'course, if I were to get real close to the nest, that may be a different story.
Rusty