Berks 1960 3. Zonotrichia atricapilla Apr. 11 6 Long Plume, Orinda, Contra Costa Co., Calif. (cont'd) grown, sheaths still in proximal 1/4 1". Very tiny sheathed foreast on rectrices 1. Rt. upper tail coverts 2,3,4,6 in sheath, 5 old. Left 2,3,6 in sheath, 4 & 5 old. Chin, throat, chest with many feathers in or just breaking sheath, coronas few grown, many old. Belly similar, flanks with more nearly grown feathers, still in sheath. A few on crissum in sheath, mostly old. Left wing: Sec. 7 with trace of sheath. 3 of middle sec. coverts just past sheath. Rt. wing: Sec. 7 with sheath, several mid. sec. covs. w/ sheath, many under sec. covs. w/ sheath. Covs with sheaths + old feathers. Q, slight fat. near Orinda Apr. 13 Bird caught by O.P. Pearson at his house, near Orinda. 3 birds thiolate - dead. Examined 13 Apr. Crown pattern 5 A-C All yellow feathers have sheaths at base, some still pin- feathers (most anterior). Less + less sheath moving rearward to over crown, on both white + black - occipital feathers brown (darker shafts) without sheaths. Vlecht ant. down mostly new, or with small sheaths yet. No sheaths on lower back - feathers look old. Central rectrices w/ sheaths, grown except for last 1/4 - 1/2 inch. No sheaths on upper tail coverts. About 1/3 frontal feathers in sheath but most 5 or more grown. Crown throat w/ sheaths only on most distal rows. No sheaths on crissum. Wing molt completed. Band dead in case - feathers case-num. WT. 25.25gm. J, tes. 2x1 mm. Very slight fat. Crown 5 [illegible]. Band 24-480326. Most of crown w/ sheath, more fully grown near occiput, all head in molt.