Mute Swan taking a break from parenting and enjoying a little preening time.
Just Hang'n Around . . . BITE'N MY BUTZZZ!
Spend some time with your subjects and see what they do. It gives the animals time to get used to your presence and back to more natural habits.
Some animals are more tolerant than others, but generally speaking you'd be surprised by how many will accept you (if you're still and quiet) and return to normal behavior.
Stay in focus,
Mark