Pond Edge

There are several things going on in this photo.

1.Black dots with circles around them. A lot of people mistake these for frog eggs, but they are just bubbles. As the shallow parts of the pond heat up in the spring, algae grow and bacteria decompose organic matter. These activities can produce bubbles.

2. Tiny sand tubes. These are made by aquatic insects, possibly tube-making caddisflies (Psychomyiidae).

3. Snail - probably enjoying slurping up the muck

Habitat: Still, woodland pond