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Modtag Roadrunner - læs mere her



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Picture:


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Picture information:
Bird species: Rose-breasted Grosbeak - (Pheucticus ludovicianus)
Bird species (IOC): Rose-breasted Grosbeak (Pheucticus ludovicianus) - species factsheet
Voice: Voices can be found here (external link).
Location: Allegany, Maryland, USA
Date: 21st June 2012
Picture info: Note striking molt limit in wings and coverts between retained juvenile brown feathers and new adult solid black feathers typical of a second-year male, compared with the recent Norway bird displaying a completed molt of remiges, retrices, and wing coverts most unusual for this age group.
Picture setup: Canon 7D, Canon 100-400mm4.0-5.6L IS USM
Photographer: Frode Jacobsen, USA
http://www.flickr.com/photos/frodejacobsen/
Uploaded: 23rd June 2012
Hits: The picture has been viewed 1433 times.
More information about this species status in Denmark can be found her: [species status].



Comments:

Jan Jörgensen writes Saturday June 23rd 2012, 1:45 pm
As noted by Frode the the norwegian bird sems to display a full set of adult primaries (if not the single juvenile prims or secondarie is hidden between the adult ones?), and primary covert. Whether the tail is all adult is difficult to se from the images, since some 2cy replace a few/half to all t-feathers in the preformative moult. Since this species is hugely variable regarding moult and appearance see herethe norwegian bird might possibly be an adult male which has failed to develope fully adult body feathers, perhaps due to being out of range. Might it be an advanced 2cy male with early replaced primaries and primary coverts?(a few 2cy males at this time of year has apparently renewed some outer primaries.

adult & 2cy

2cy (SY) male in May

2cy (SY) male in Sept

Notice in the last May bird here the blacker outer primaries.

JanJ



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