Here’s another find from December, this one attached to the local park railings. It’s the empty cocoon of a Vapourer moth (Orgyia antiqua), covered in the moth’s eggs. (I’ve blogged about finding one of these cocoons before, though that one was very fresh – see A Vapourer cocoon, 13 October 2023, which also included an image of the caterpillar.) Female Vapourers can’t fly (the UK Moths website has a photo of the female, which, at first sight, doesn’t look like a moth at all) – their sole purpose is to attract a mate and lay eggs. Presumably, this female scarcely moved from her cocoon, immediately emitting male-attracting pheromones as soon as she emerged. A male found and mated with her, and her empty cocoon became a very close and convenient place to lay her eggs.