Heuglin's Gull (L. heuglini / antelius)

(last update: 10-2-2011)

Measurements of 'West Siberian Gulls' Larus heuglini antelius, from the Kanin Peninsula, Russkii Zavorot Peninsula and the Gulf of Ob, Russia.

Table 4 from: Descriptive update on gull taxonomy: 'West Siberian Gull', by Valery A. Buzun published in British Birds 95, 2002, 216-232.

Measurements were taken with a ruler to an accuracy of 1 mm, or with callipers to an accuracy of 0.05 mm, for the following;
WL = wing length, flattened and stretched;
HL = humerus;
UL = ulna from olecranon to the labrum condyli;
S = sternum from the apex to the edge of the cartilage at the caudal end;
C = tail;
TL = tarsus;
MTL = middle toe without nail;
KDB = length of skull from the crista frontalis interior to the tip of the bill [equivalent to head + bill];
BL1 = length of bill from border of feathering;
BL2 = length of bill from front edge of nostril;
BH1 = vertical depth of bill from tip of gonys to the culmen, without compression;
BH2 = inclined depth of bill perpendicularly from the proximal side of the gonydeal angle to as far as the culmen;
BH3 = vertical depth of bill at level of rear of nostrils;
BW = width of bill at level of rear of nostrils.