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|© John Pickering, 2004-2016|
|Larvae of the Dusky Birch Sawfly, Craesus latitarsus, feed gregariously together, consuming one leaf and then the next. They may keep their tails away from the leaf as a means of waste management. If their frass lands on their leaf, they are more likely to spread pathogens to each other.|
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Updated: 2017-01-25 02:30:15 gmt
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