(last update: December 2015)
crassirostris rings crassirostris PDFs
1CY July-Sept 1CY Oct-Dec
2CY Jan-March 2CY April-June 2CY July-Sept 2CY Oct-Dec
3CY Jan-March 3CY April-June 3CY July-Sept 3CY Oct-Dec
sub-ad Jan-March sub-ad April-June sub-ad July-Sept
adult Jan-March adult April-June adult July-Sept adult Oct-Dec
Please visit Hiro's photostream on Flickr.
Juvenile birds, all three with most of the scapulars replaced for 2nd generation feathers.