|Just two white primary tips clearly showing past the tertials on 25 August 2012.|
|Three primary tips showing past the tertials on 15 September 2012. P8 grew significantly in the last three weeks.|
|Now 4 primary tips showing beyond the tertials on 06 October 2012.|
|Finally, the tip to P10 (black) has emerged from underneath P9. 26 October 2012. This generally concludes the prebasic molt as most of the body and flight feathers are renewed by the time P10 is fully grown.|
Rainbow Beach. Chicago, IL. 26 Oct 2012.