Example 4
IMG 2964

Athene noctua

(Little Owl, Chevêche d'Athéna, Steinkauz, Mochuelo común)

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10 Secondaries of the left wing

 

Feather

 S10

S9

S8

S7

S6

S5

S4

S3

S2

S1

Length (mm)

 98

99

102

104

105

108

109

110

111

112