Point Reyes wren

Not the best pictures, but only half of camera trapping is about taking pictures.

Anyway, this is the kind of picture we would encounter while taking a lab quiz in Natural History of the Vertebrates back in the 60s. You had to know the key characters, of which perhaps one or two were visible.

These two images from Point Reyes National Seashore seem to be of a winter wren. The diagnostic features -- the faint eyebrow and the dark barred flanks give it away. And by the way, I had to check Sibley's guide to give you that information.