Tent Caterpillar

5706    Hi – I live in Ottawa and we are seeing a ton of these this year. Are they a problem for us?

This is a tent caterpillar (Lepidoptera: Lasiocampidae; Malacosoma sp.); likely a forest tent caterpillar, M. disstria, see http://tinyurl.com/hensdpb for images and more detailed information. Ed Saugstad, retired entomologist; Sinks Grove, WV.