GREATER SCAUP (continued) 
Age Determination of Males 
1. Upper Wing: 
(a) 
(b) 
Tertials are smooth or lightly frayed to a 
rounded tip. Over the tertials, greater 
coverts are wide and rounded. They are usually 
at least lightly flecked over primaries, second- 
aries and tertials. Middle coverts are vermiculated 
to lightly flecked evenly over coverts -------------- 
Tertials are frayed to a pointed tip and may be 
either flecked or plain. Greater _coverts are 
narrower, frayed somewhat towards a point over 
the tertials, and generally unflecked. Middle 
coverts are vermiculated to lightly flecked. 
Flecks are usually recessed 1/8" from the edges 
of individual covertS -9---<----en ne rene nnn nnn n nnn 
Age Determination of Females 
1. Upper Wing: 
(a) Tertials are smooth or lightly frayed to a 
(b) 
rounded tip. Greater coverts are wide and 
rounded over the tertials, but rarely if ever 
flecked. Middle coverts are usually lightly 
flecked particularly near the edges of individual 
coverts but they may be plain ----------------------- 
Tertials are invariably frayed to a pointed tip. 
Over the tertials, greater coverts are narrow, 
frayed to a point, and unflecked. Middle coverts 
are usually plain but occasionally lightly flecked 
mear the edges of individual coverts ---------------- 
Immature - 
