Bailey 1959 Chaetura sp. May 10 Month, Jenkile Piers, sea level, Mendocino Co., Calif. Saw these birds here, and as far north as Westport, yesterday and today. Never saw more than 2 at a time. This morning shot a bird from swooping low over a sometimes-pastured field - it, as were many of the others I saw, was flying more or less in association with swallows (e.g., Barn). As I recall, the swifts were all silent - differing from the Chimney Swift in this respect. The bird I shot was a S (REB 463) with nearly round tests measuring 4mm. There was no well developed cloacal protuberance; the ventral surface was largely bare, but while fairly thick-skinned, did not seem to be vascular or edematous. There was a large single-layered area in the back and roof of the skull. The [illegible], at the point of flexure while shinning, were soft & pliable - couldn't thread them, but cut them instead. The claws were bent back on the toes (reflexed), apparently naturally, not just a result of death, or claw. There are a couple of old dead hollow trees here, about 2 mi. from the shore where a small stream enters the north side of the [illegible] valley. Saw swifts and tree swallows there occasionally, and suspect they may find this a suitable nesting site.