Perching birds love those telephone poles, fences, and fence posts. And often you can get an "unobstructed" view with the potential for a good photo. Of course, lighting can be a problem, but we take what we are given and give thanks for the opportunity.
Swallows are particularly fond of wires. Gives them a clear view of their food. Here are a few photos taken over the past year or so of some Barn Swallows: