Asio otus

Long-eared Owl / Hornuggla

Main author:
Stina Andersson, November 2014.

Supplemented by:
Magnus Hellström, November 2014.

Citation: 
Ottenby Bird Observatory. 2015. Ringers' DigiGuide - Asio otus. 
www.ringersdigiguide.ottenby.se
 
MOULT:
                      Adult          Young
summer        
SC*             sp
winter             -                   -
Young sp: The post-juvenile moult includes the body, LC, MC and all GC, but not remiges, PC or tertials.
Adult SC: The post-breeding moult (June-November) is complete, but c. 35% of the older (2cy+) birds at Ottenby have left one or several SS unmoulted. SS generally moulted from three different centres, often with SS1-4, SS5-7 och SS8-12 in each group. Tail does usually not show any contrasts since all RR are generally shed and grown simultaneously.
AGE:

Autumn
Spring
SEX:

Autumn and spring
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