2cy (argentatus), August
A 2cy argentatus, ringed orange
C044U as pullus on July 06 2001 in Tampere, Finland (61.31N,23.43E). The complete moult is well underway with
most wing-coverts and the inner primaries moulted to second generation.
All juvenile primary have been dropped. P1-P7 are fully
grown second generation flight-feathers and P8 is already reaching at the
length of P6.
The tertials and most of the wing-coverts are replaced for second
generation feathers. The only wing-covert still to be replaced are the
lesser coverts, of which most feathers are still missing. All scapulars have been
replaced by second generation feathers, including the scapulars in the
lowest row. The upper scapulars were replaced long ago and look
abraded already. A few new third generation scapulars are moulted in in
the lower upper scapular row.
By August, the warm brown tones of the first moulted
wing-coverts (inner greater coverts and median coverts) are faded to
plain white, leaving a contrasting barred pattern on the wing-coverts. On
average, 2cy argentatus is more contrastingly patterned than same
aged 2cy argenteus, especially regarding the pattern on the central
greater coverts. However, some argentatus are distinct "washed
out" brown, showing the common vermiculated pattern of 2cy argenteus.
last moulted coverts are the central greater coverts and outer lesser coverts, replaced by
mid-August. From mid-August onwards, 2cy argentatus start the partial autumn
moult, starting again to drop the upper tertial and inner greater and
median coverts. In this individual, the upper tertial is very worn
and will probably be dropped soon.
In the table below, the primary moult
scores of 2cy August argentatus in Finland can be read:
in August, Tampere landfill, Finland, August 10 2002, 10:00-12:00 h.
primaries: m = 9.3, SD = 0.69, n = 139.
new primaries: m = 6.9, SD = 0.47, n = 139.