Marshall, 1947 Melospiza April 29 San Mateo Co., Calif. Accompanied Wade Fox along west of hills of SF Peninsula. Series of ponds - typha, willow-bordered. Summit supports tremendously dense populations - on very moiste ground; cover is junceus, Baccharis, Heracleum, multitude of other flowers & weeds. More above dense & terr. more overlapping than San Pablo marsh. At SSF salt marsh saw 3 pairs pusillula along 350 yds of slough in very small st marsh relic - being now drained & filled. These birds noticeably small & yellow below, grey above. Not much singing, are in pure salicornia, but still only on edge sloughs when hop or mind of flat edge or banks. Flush from salicornia. Grindelia present but not a factor in SS dist. as is so higher than salicornia & is uncommon & not conspicuous, as was found before at this marsh; SS in pure salicornia, forage under banks, silent largely, fly long distances (100 yds) along sloughs. One pair went into Baccharis briefly on roadside. Do not "squeek out"! Very elusiv & mouselike; got diff all around from conspicuous, singing, fighting SS & hills above. Grindelia is cuneifolia