Startside I samarbejde med DOF
Home
DK obs.
VP obs.
Nyheder 
DK listen
Forum
Galleriet
 Artslister 


Modtag Roadrunner - læs mere her



Galleriet

Billede:


klik for at se i stor størrelse

Billede information:
Fugleart: Rosenbrystet Kernebider - (Pheucticus ludovicianus) - Rose-breasted Grosbeak
Fugleart (IOC): Rosenbrystet Kernebider (Pheucticus ludovicianus) Rose-breasted Grosbeak - species factsheet
Stemme: Stemmer findes her (eksternt link).
Lokalitet: Allegany, Maryland, USA
Dato: 21. juni 2012
Billede 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.
Billede opsætning: Canon 7D, Canon 100-400mm4.0-5.6L IS USM
Fotograf: Frode Jacobsen, USA
http://www.flickr.com/photos/frodejacobsen/
Uploadet den: 23. juni 2012
Hits: Billedet har været vist 1463 gange.
En oversigt over forekomsten af denne art i Danmark findes her: [fund oversigt].



Kommentarer:

Jan Jörgensen skriver lørdag 23. juni 2012 kl. 13.45
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



Nye kommentarer til dette billede er ikke muligt.



Bemærk: at alle billeder har copyright og må ikke anvendes uden accept fra den respektive fotograf.



til toppen copyright © 2002-2005 Netfugl.dk - Danmark
kontakt os: netfugl@netfugl.dk - om os: webmasters - genereret på 0.044 sek.
til toppen