Peekaboo

I brought in a begonia leaf to give my caterpillars some variety in their diet, and found a tiny red and yellow spider on the underside. Two days later, the caterpillars had remodelled the spider's home, adding windows and a door.

And look what was inside!

Spiderlings behind a web curtain

And looking out the window.

Mother and baby. Mommy is 1/2 centimetre long.

The remains of the leaf,, with spiders and aphid.

Watching over her brood.

UPDATE: She's a cobweb spider, Enoplognatha ovata, form redimita. Her spiderlings will overwinter in the leaf litter, so I'll put their leaf back under the begonia where I found it.