Anas platyrhynchos

Mallard / Gräsand

Main author:
Stina Andersson, July 2014.
Supplemented by:
Magnus Hellström, July 2014, Daniel Bengtsson, February 2016.

Citation: 
Ottenby Bird Observatory. 2015. Ringers' DigiGuide - Anas platyrhyncos. www.ringersdigiguide.ottenby.se
 
MOULT:
                      Adult          Young
summer        
SC               sp
winter            wp               wp
Young sp: The post-juvenile moult (c. July-September) includes parts of body, e.g. breast, flank, parts of mantle, scapulars and head.

Young wp: The pre-breeding moult (c. August-November, but often prolonged during winter/early spring) starts shortly after completing the post-juvenile moult. Includes most of body parts, scapulars, tertials, tertial coverts and tail. The extent and timing of the moult is much depending on the date of hatching. Females usually retain some juvenile tertials and tertial coverts until the following spring, whereas most males have moulted all tertials by late November (probably due to sexual selecton).

Adult SC: The post-breeding moult (c. May-September) includes the complete plumage. Flightless for c. four weeks in mid-summer while moulting primaries.

Adult wp: The pre-breeding moult (c. August-November, but often prolonged during winter/early spring) starts shortly after completing the post-breeding moult. Includes various parts of body, scapulars, tertials, tertial coverts and tail.
AGE:

Autumn males
Autumn females
SEX:

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