Two weeks ago in Red Rocks park I observed a Ruby-crowned kinglet in a
rough imitation of a hummingbird, hovering briefly enough to touch its bill
to cones hanging from the branches of a hemlock tree. Sibley describes this
behavior for this species and says they feed off small insects on the cones
and leaves of conifers. A naturalist acquaintance who I described it to
called it "hover gleaning".
Yesterday in Red Rocks a Ruby-crowned kinglet was singing and a Hermit
thrush was not.
This morning, a female Rose-breasted grosbeak at my feeder.