Birds 1959 Perisoreus canadensis July 2—Nato Pass, Grant Co., Idaho.—Saw a pair of these birds when I arrived here last evening about 6 p.m. This morning I saw them in my camp, followed closely by a Ruby-crowned Kinglet, as they hopped silently from tree to tree; the kinglet, crest patch erect, following giving a “— — —” “peet, peet, peet” constantly. Later, a single bird came into camp, followed by the kinglet, and I collected it as 660. A few minutes later the other bird came into camp, with the kinglet, gave notes in perfect imitation of an Olive-sided Flycatcher, then more typical Jay notes, quite obviously looking for its mate; I couldn't get a shot. It flew away, going only a tree or two at a time, with the kinglet following a few feet behind. The bird collected was molting heavily, as indicated by its rectrices (one tail feather fell out during preparation). The body was molting, seen from inside, but not the head. The bird was a ♂, with testes only 3mm. long. The skull was completely ossified. Both lateral rectrices lost.