moth eggs laid on an indoor wall
Leptocneria reducta, LYMANTRIIDAE
Some caterpillars are found in houses because their mother moth flew in and laid eggs there.
Some caterpillars live on walls and in crevices in the house, feeding on mould or algae.
Some caterpillars feed on the seeds and fruit that we bring into the house to eat, and may have been laid as eggs, for example in flour, rice, nuts, dried fruit, or muesli.
Most caterpillars feed on leaves outdoors. There are 3 basic reasons why these caterpillars leave their foodplant and come into the house:
To stop particular caterpillars coming into or found in the house, it is necessary to identify the species they belong to. Then you can establish whether it an accidental or deliberate incursion. To identify the species: a photo can be really helpful. Also a description would also help with information on its length, colour, any patterns, hair distribution, number of prolegs, how they move (loop or crawl), any other habits, and what were they were feeding on.
(updated 5 March 2007, 23 November 2013)