The ‘rule’ is avoid man made structures. Simple, but not until you have to think about passing on a shot. Like here.
A bird on a telephone line, for me, is not a good photograph.
However… this is an American Kestrel, Sparrow Hawk, and the most beautiful of all raptors. Also the smallest, probably the size of a Robin.
These lines run along a dirt road that cuts through the wildlife areas.
Kestrels and Kingfishers love them.