118 Yellow-bellied Sapsucker R.E.Johnson 1967 March 3 Tilden Regional Park, Alameda Co., Calif. Partly cloudy, windy, occasional warm sun, otherwise cool. 11:30 AM. Twice a red-breasted type probed in holes on a large (10 inch) vertical limb of a Coast Live Oak (one of several trees in a cluster along a creek bottom). No pecking sound was heard. Holes occur down onto 14 inch branch & up to 6 inch limbs. Holes on larger limbs look fresh (reddish bark showing) with bark bared around holes. Holes on smaller limbs are mostly older (blackened) & tend to be in more regular rows (1/2 inches × between rows) around limb. Holes appear to be larger on the larger limbs. Holes occur in horizontal & vertical limbs. Bird returns at 12 noon & probes deep into Fresher looking holes on 6 inch limb. It probes at all angles, twisting head bill from side to side. It then rests, looking from side to side ocasionally & blinking eye (upper lid coming downward but perhaps not all the way to lower lid). Moves back to same holes & probes & peeks in them quietly, then moves away to large limb, then back again to same holes (preferred). There doesn't appear to be any pattern or relationship between old & new holes. New ones occur scattered among old & sometimes overgrown ones. Inspected holes. Holes appear to go through back too wood (not certain). Holes in limbs from 2-14 inches