I noticed this insect as it was struggling to manoeuvre through fairly long grass. In the pictures it is on a blackberry leaf but it fell there when I bumped it. Its body and head are about 1 1/2 inches long and the antennae are about the same length. It has 6 long legs – there appears to be wings but it never opened them. I found this insect in a 15 year old Douglas Fir plantation, so the area has lots of vegetation, trees, grass, bushes and all sorts of plants. I live in Campbell River British Columbia. I have seen insects like this one before but have been unable to identify them. The over powering feature about them aside from their fairly large size is the bright blue colour.
This is a banded alder borer.
It is found in the western United States plus British Columbia and Alaska, from California and New Mexico north. Larvae feed in dead hardwood trees: maple, alder, oak, willow. It does not harm healthy trees.
These longhorned beetles are confused with the eastern Asian longhorn, but if you look at photos of the two, the banded alder has much more distinct black and white bands while the asian has spots that are not in a certain pattern. They are both in the Cerambycidae or longhorn beetle family.