Of course, there isn't any yet. Not even any water boatmen or pondskaters moving around today. Some blanketweed (that fine, stringy algae that accumulates into thick masses) has grown around some of the pond plants, so I thought I'd try to remove it.
Plunged hand into pond. Aaaarghh!
No wonder nothing's moving. It's flipping freezing. Not literally, of course, but it didn't feel far off. My fingers soon felt frozen to the bone. Maybe I need to wait til it's warmed up a bit.