ML85673591
Contributeur
Shai Mitra Fichiers multimédias de ce contributeur Profil
Date
Site d'observation
Heckscher SP, East Islip
Suffolk, New York, United States
Fichiers multimédias de cet endroit Liste illustrée- Âge
- Non précisé
- Sexe
- Non précisé
Détails de l'observation
a very rough and highly conservative estimate based on sampling of birds close enough to identify easily. In about 20 rough samples of 100 or so birds, I only failed to find any LESC on one or two occasions, whereas the proportion of LESC was above 5% on more than half and close to 10% on a few. These samples were taken at widely varying places within a relatively near flock of ca. 10,000, yielding an estimate of ca. 500 LESC for this flock alone. I did not extrapolate this proportion to the more distant flocks without direct evidence that these contained comparable numbers of LESC, but I would be surprised if they did not. Thus it is likely that 2000-3000 LESC were present. Several LESC visible in each photo.
Informations techniques
- Modèle
- Canon PowerShot S90
- ISO
- 80
- Longueur focale
- 6 mm
- Flash
- Flash did not fire, auto
- f-stop
- f/4.0
- Vitesse d'obturation
- 0.01 sec
- Dimensions
- 2653 pixels x 1591 pixels
- Taille originale du fichier
- 763.55 KB