When not to poke your nose in

A late afternoon walk around the park with Dylan today, as we crossed the bridge the swans were underneath so I tried to get a good photo from above as they dipped in and out of the water. It was only when I looked through my photos later I noticed this one - Dylan is very wary of the swans and knows to stay well away but he must have been wondering on what he was missing out on and he poked his nose through the bridge, he very quickly retreated!!