Kullanıcı
Rob Fowler Bu kullanıcının medyaları Profil
Tarih
Konum
Arcata Marsh--Oxidation Ponds
Humboldt, California, United States
Bu konumdan medyalar Resimli Tür Listesi- Yaş ve cinsiyet
- Erişkin dişi - 1; Erişkin erkek - 1
Medya notları
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.
Gözlem detayları
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.
Teknik bilgiler
- Model
- Canon EOS 7D Mark II
- Lens
- EF400mm f/5.6L USM
- ISO
- 320
- Odak uzunluğu
- 400 mm
- Flaş
- Flash did not fire
- Diyafram açıklığı
- f/5.6
- Shutter hızı
- 1/3200 sec
- Ebatlar
- 1229 pixels x 819 pixels
- Orijinal dosya boyutu
- 569.12 KB