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3968

img 5720 - 150 DPI
img 5721 - 150 DPI

Charadriiformes
Waders, gulls and auks

Laridae Larus
Black-tailed Gull (Larus crassirostris)

Foto der Art Larus crassirostris (Japanmöwe) © Jo Kuyken

age / gender juv.
finding location Hafen von Itō
Shizuoka, Chūbu, Japan
finding circumstances dead find
finding date 28.08.2017
coll. A. Haase
created: 23.12.2018
showcase

remarks

ohne Steuer erhalten mit Schulterfedern der anderen Körperhälfte

species identification

Durch Finder bestimmt,Beleg ist deutlich kleiner als das adulte Exemplar in der Sammlung. Aufgrund fehlender Vergleichsbelege kann die Bestimmung nicht verifiziert werden.

age identification

Vogel zeigt erstes Federkleid. Mauser nicht erkennbar und Federn noch nicht stark verschlissen. 2. KJ kann daher ausgeschlossen werden

measurements

feathers

longest primary P9=288,5mm
longest secondary S15=S14=149,0mm
primary/secondary difference 140mm
primaries-index 49%
all values

P1 155.5mm
P2 167.5mm
P3 182.5mm
P4 200.5mm
P5 221.5mm
P6 243.5mm
P7 263.5mm
P8 280.5mm
P9 288.5mm
P10 278.0mm
S1 148.5mm
S2 145.5mm
S3 142.0mm
S4 140.0mm
S5 138.0mm
S6 137.0mm
S7 139.0mm
S8 138.0mm
S9 139.5mm
S10 141.0mm
S11 142.0mm
S12 145.5mm
S13 148.0mm
S14 149.0mm
S15 149.0mm
S16 148.0mm
S17 148.5mm
S18 143.5mm
S19 134.5mm
S20 118.5mm
S21 90.5mm