IMAGES: 1) many juveniles (standing and in flight) 2) 1 second year bird (standing) DESCRIPTION: Iceland x Thayer's Gull hybrid (Kumlien's Gull) (...) glaucoides x thayeri BILL SHAPE: ... HEAD SHAPE: ... WING EXTENSTION: ... POSTURE/HABITS: ... FIRST WINTER SECOND WINTER THIRD WINTER ADULT WINTER BILL COLOR: ... ... ... ... LEG COLOR: ... ... ... ... IRIS/ORB RING: dark ... ... ... HEAD: ... ... ... ... UNDERPARTS: ... ... ... ... PRIMARIES (folded): ... ... ... ... PRIMARIES (in flight): ... ... ... variable, often w/ thin dark gray (may be nearly black) line on outer webs of P8-10 and subterm bands on P6 or 7 through 9 (never on P5 like Thayer's); large white mirrors (terminal on P10) on P6-10; nearly all white from below SECONDARIES (in flight): ... ... ... ... TERTIALS: ... ... ... ... GREATER COVERTS: ... ... ... adult gray LESSER & MED COVERTS: ... ... ... adult gray SCAPULARS: ... ... ... ... BACK: ... ... ... ... RUMP: ... ... ... white TAIL: ... ... ... white The was table created by Steve Hampton and is intended to futher our knowledge of gull identification. Please email me at shampton@ospr.dfg.ca.gov if you have any suggestions for updating or improving this table. Thanks.