also

[phosfate]

Swans, when they (for want of a better word) run across the water, make GO AWAY STUPID BEE a very loud THOP THOP THOP THOP THOP noise. It may be their wings beating close to the surface. Hard to see through the trees.

There is also a bird that sounds like someone strangling a kitten. Gretchen says she doesn't know what it is.