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(5 images) Yellow-legged Gull
074S
michahellis,
July 2001 - June 2003, Etaples, NW France.
Ringed white right 074S
in the Camarque (S France in year 2000).
Description: Tertials #1, 3-5 fully
grown, #2 probably missing. Greater coverts #1-3 slightly bleached,
#4 to the outer-wing fresher. Median coverts #1-11 pretty fresh (#7
growing), #12-14 missing, #15-19 2nd generation, #20 to
outer-wing missing. Some lesser coverts missing and growing but
lower lessers fully grown. Most scapulars 3rd generation,
but at least 2 are 2nd generation and very abraded; no
scapulars missing. Outer tail feathers (R5, R6) are growing (and are
at 3/4 of the length). Mantle grey with brownish centre.
P7 full-grown and p10 juvenile.
Actively moulting secondaries: S1
full-grown, S2-3 growing and S4 to inner-wing missing, but there is
a small block of 5 secondaries still present in the inner wing.
For similar secondary moult
insight, see the
adult section, photo 5605.
image below: 074S
michahellis 2cy,
July 28 2001, Etaples, NW France.
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image below: 074S
michahellis
3cy, June 14 2002, Etaples, NW France.
A 3cy michahellis
showing pale pinkish legs, a clear yellow base
of the bill, a rather dark iris, a red gonydeal spot (although obscured by the black
bill-band) and complete grey upper-parts (mantle and scapular region). The
orbital ring is obviously red. This
bird was ringed near Marseille, S France, probably in year 2000. When data
are available, more information will be added.
Most grey feathers in the wing-coverts are in better condition than the
barred feathers, and apparently moulted later, i.e. in the partial autumn
moult in 2cy (September-October). The inner greater coverts, the inner medians,
a few lower lesser and some lesser coverts appear plain
grey. The
upper tertials are at least third generation as well, maybe even fourth
generation, depending on the extend of the partial post-juvenile moult and
the partial autumn moult as 2cy.
The tail is complete and all rectrices
are second generation. The primary moult stage is P5 old, P4 missing. By
mid-June, several 3cy michahellis were observed with primary moult
score P3 missing / P4 old or with P4 missing / P5 old. Records in the
surveys are too low to extract any conclusions, but 3cy birds are on
average 1.5-1.8 primaries behind compared with 2cy birds. Extrapolation of
figures can be read from the following table, with the conclusion that 3cy
michahellis primary score will be at about 4.9-5.4 by mid-June.
extrapolated
michahellis primary scores for June 3cy at Etaples. Complete
tables can be found in the corresponding sections. |
date |
June
13-14 |
July
10 2002 |
July
10 2002 |
July
27 2001 |
July
27 2001 |
July
28 2001 |
July
30 2001 |
2cy
michahellis remaining primaries. |
n
= 41
m = 7.0
SD = 0.7 |
n
= 48
m = 8.8
SD = 0.53 |
n
= 45
m = 8.8
SD = 0.57 |
n
= 51
m > 10.0* |
n
= 55
m = 10.0
SD = 0.75 |
n
= 51
m > 10.0* |
|
2cy
michahellis new primaries. |
|
n
= 45
m = 5.4
SD = 0.53 |
n
= 42
m = 4.5
SD = 0.51 |
n
= 51
m = 6.6
SD = 0.51 |
n
= 55
m = 6.4
SD = 0.50 |
n
= 51
m = 6.4
SD = 0.45 |
|
3cy
michahellis remaining primaries. |
m
= 4.9-5.4 |
|
n
= 33
m = 7.0
SD = 0.61 |
|
|
|
n
= 92
m = 8.5
SD = 0.58 |
Notes:
n: total number of observations
m: average score
SD: Standard Deviation
*: m > 10.0, i.e. the weighted average is beyond the number of
remaining primaries.
Conclusion:
Backwards extrapolation of 3cy moult scores would result in 5.4;
Backwards extrapolation of remaining primaries of the relative
differences between 2cy and 3cy birds would result in 4.9. |
In the wing-coverts, active moult has
been suspended in this individual. There are no moult gaps and the grey
wing-coverts and tertials which were included in the partial moult are
already slightly abraded.
top image: michahellis 074S
3cy, June 14 2002, Etaples.
2 images below: 074S
michahellis
3cy,
September 21 2002, Etaples, NW France.
074S is another coloured bird,
being almost all grey in the scapulars and wing-coverts as 3cy michahellis.
Note the brown markings on the fourth tertial and the brownish wash
on the outer greater coverts. The bill is obviously sub-adult, the
legs are rather whitish yellow and the iris is very pale as well,
slightly pigmented. Note also the small white tips on the outer
primaries and P9 lacking a mirror.
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bottom image: michahellis 074S
4cy, June 28 2003, Etaples. 074S
was seen again at Etaples by late June 2003. The primary moult score:
P6-P10 still old. P1-P3 are fully grown (P3 obviously longer than P2 but
an inch or so to grown). Dark primary coverts. The complete tail is
present and plain white. Note the limited black markings on the bill and
the brown abraded wing-coverts.
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