Thayer's Gull (thayeri)
(last update: January 22, 2013)
FIGURE 1.
FROM: FIRST PREBASIC MOLT IN HERRING, THAYER'S, AND GLAUCOUS-WINGED GULLSBY: STEVE N. G. HOWELL, JON R. KING & CHRIS CORBEN
IN: J. Field Ornithol., 70(4):543-554, 1999
Timing of first prebasic molt in Herring Gulls (HEGU) wintering in central California during 1997/1998 to 1998/1999 winters, expressed as percent area of first basic (B1) scapulars attained. 0% first basic scapulars indicates full juvenal plumage (see text). Numbers per month are 10-d periods. Numbers at top are sample sizes. Data per 10-d period are expressed as percentages of total number of birds that period.
CLICK HERE FOR FIGURE 2 - THAYER'S GULL
CLICK HERE FOR FIGURE 3 - GLAUCOUS-WINGED GULL
