Catalog 172545 418 Larus glaucescens Location: Cowley Rocks, Massett Inlet, Graham Island, Date July 25 1980 Queen Charlotte IIs, B.C. Canada sex ♀ 4 ova > 0.10 cm Weight : 1020g Fat Good Winglength (R) 42.6 Span : 143.5 cm Pr. length lb 30.5 7 29.8 9 31.2 6 molted 8 30.7 5 4 Tail length : 17.0 Tarsus (R) 5.97 Tars in 4.12 mid 5.39 but 5.12 Head length : 12.37 Hep 0.57 Bill length : 5.45 post mass : 3.63 Bill width : 1.21 Gape : 3.27 Bill depth Gouys: 1.93 and mass: 1.86 post : 1.69 Brood patches : middle 3 weakly feathered Bill color Um: 2.5YR/12 lm: 2.5Y9/12 feet: color 14 eye ring color : 5RP5/4 Irides : 5Y8/3 Pigment : 10YR 3/3 light flecks throughout Legs : 5RP6/4 Remarks Stomach empty. Both alulae. P° 10-7,5-1.