This beautiful creature appeared on the kitchen window. I believe it is a silver-spotted tiger moth (Lophocampa argentata).
This guy is considered a pest by some tree-loving gardeners because it munches on pine and fir trees--mostly Douglas fir.
Although the moth rarely kills trees, aggregations of the bug build webbed tents on a single branch. Some gardeners consider the tent and the foliage damaged by the moth's table manners to be unsightly. Heck, though. Everybody's gotta eat something.
In spite of its carnivorous feline name, this tiger moth is easy prey for birds. Academic-type entomologists recommend ignoring this critter because the damage it does is minimal.
Works for me. Any time a bug gets killed, it makes a mess that somebody has to clean up--squashed goo or insecticide spills if humans take the matter into our own hands. Most of the time (pestilential invasions of Mormon crickets come to mind) birds thrive on the work. Let 'em have at it.