green leaves

Most of the leaves are down around here now, except for some of the oaks, and the beeches of course, which keep their brown leaves on until spring. But I noticed a large shrub today that is still green. It's not a rhododendron or another evergreen, it is a pussy willow. A quick internet search gives me no information as to when they generally drop their leaves, but I'll have to keep an eye on this. Always something new!