The tips of the tender new growth on many of my Red Maples (and Sugar Maples) are dying. The last few inches of the stem and the last few leaves shrivel up and turn black. This was a mystery to me, until I cut into a twig just below the dead leaves, and found a tiny little worm. I checked many stems, and there was a tiny worm in every one. I couldn't find ANYTHING about this on the internet. Does anyone know what these little buggers are?