Whilst deadheading some roses in the garden, I came across these happy pair which had virtually munched their way through a whole rose-leaf. It is called Arge nigripes.
Notice how the one has it back-end in the end. This is a tell-tale sign that these are not your normal moth or butterfly caterpillar, but the larva of a species of sawfly. If disturbed they will whip their tails around to ward off predation, sometimes spraying a foul chemical. Another way to tell is that they have six or more prolegs, a few more than their lepidopteran friends.
They are quite gregarious creatures, so I guess I am fortunate to just have the two of them, as far as I could see. Although I did spot a bunch of other sawfly larvae shortly after, rapidly consuming fresh rose shoots, but that’s another story.
This one here is almost quite cute as he hugs the leaf and almost appears to smile …
In large numbers sawfly larvae can become a serious pest, but thankfully they appear to be doing but a little harm to my roses. And when viewed from above it has quite beautiful pale and dark green stripes running the length of it, and a darkish brown stripe on its head.
Sawflies belong to the order of insects called Hymenoptera, same as the bees, wasps and ants. Adult sawflies are harmless and do not sting. The females cut through plant tissue to lay their eggs inside. And the result are these hungry caterpillars.
Photographs taken July 2016, on rose-bush, rear garden, Staffordshire.