
PINTAIL (continued) 
Age Determination of Females 
1. Tertials: 
(a) Faded and badly frayed, may have wispy tips, 
often without light edging -~-------------------+- Immature 
(b) May have considerable fraying but no wispy 
tips, always some light edging ------------------- Z 
2. Tertial Coverts: 
(a) Narrow, sometimes frayed or with wispy tips, 
may be unedged -------------+------~----------------+ Immature 
(b) Broadly rounded, may be frayed, but no wispy 
tips, always edged ------------------~-----------+- 3 
3. Greater Coverts: 
(a) Narrowly edged (anterior speculum bar) with 
pale buff or white, often appear square, 
bases often barred -----------------~+------+-------- Immature 
(b) Narrow to wide edging pale buff to buff, 
margin of outer web rounded, bases show a few 
small spots or are plain ------------------------- 4 
4, Middle Coverts: 
(a) First row appear pointed or small and trape- 
zoidal, external type interrupted -barring 
very common (figure 4a). -------He---- ener rene n ene Immature 
(b) First row appears large and rounded, internal type 
interrupted-barring (figure 4b). ----------------- Adult 
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