Laguntzailea
Rob Fowler Laguntzaile honen media Profila
Data
Kokapena
Arcata Marsh--Oxidation Ponds
Humboldt, California, United States
Kokapen honetako media fitxategiak Ilustratutako zerrendak- Adina eta sexua
- Eme heldua - 1; Ar heldua - 1
Iruzkina
In this photo you can see that the wingbar is clearly broader than the trailing edge of the speculum. Even at this more head-on angle you can see the difference in width between the wing bar and trailing edge.
Behaketaren xehetasunak
Adult male with a female. Photos of female speculum clearly show a broader wingbar vs the trailing edge. According to Reeber's (2015) waterfowl book this is probably the best (only?) way to tell female crecca vs. carolinensis. I've never documented a female crecca in the US so open to suggestions from anyone with more experience.
Informazio teknikoa
- Eredua
- Canon EOS 7D Mark II
- Lentea(k)
- EF400mm f/5.6L USM
- ISOa
- 320
- Distantzia fokala
- 400 mm
- Flasha
- Flash did not fire
- f-stop
- f/5.6
- Obturadorearen abiadura
- 1/3200 sec
- Dimentsioak
- 1229 pixels x 819 pixels
- Fitxategiaren tamaina originala
- 569.12 KB