2cy (argentatus), August
12 2002, Tampere,
A 2cy argentatus, ringed in Poland
with a metal ring, Gdansk DN-12962.
The complete moult is almost finished with most wing-coverts and the inner primaries moulted to second generation.
The outer primary P10 is still juvenile and P1-P7 are fully
grown second generation flight-feathers.
The upper four tertials and most of the wing-coverts are replaced for second
generation feathers. The central greater coverts are fully grown
and the gaps of the last missing wing-coverts can be found in the upper
rows of the lesser coverts. All scapulars have been
replaced by at least second generation feathers, including the scapulars in the
By August, the fringes of the first moulted
wing-coverts (inner greater coverts and inner median coverts) wear away. 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 (obviously including
this individual) are distinct "washed
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
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.