now im not saying this is fake or anything, nor do i know shit about birds and their behavioral patterns, but i really cant think of an occasion where ive seen birds perched on telephone wire perfectly spaced out like that. usually they hang in huge clusters, cramming as many birds on one wire as humanly possible.
Compare the shot of the sky with birds as opposed to the one at the end without. The clouds are exactly the same, as is the lighting. Either they all vacated immediately after he took this photo, or its a nice idea that had to be manufactured.