ML488078331
Přispěvatel
Datum
Lokalita
- Věk a pohlaví
- Neznámý věk, neznámé pohlaví - 2
Podrobnosti k pozorování
Two initially spotted by Russ Naylor, seven small Canada-type geese in total seen together among 500 +/- Canada Geese. Noticeably smaller geese with shorter necks, short stubby bills, easily compared to adjacent Canadas. Per eBird reviewer "Sorting out Cackling and Canada is complicated because no Cacklings breed in or near CT, so we have no idea where ones we see here are coming from. The first thing to bear in mind is that size alone is not sufficient to separate the two species. The size range of Canada Geese is very wide, and at the small end for Canada, birds known as "Lesser" Canada Geese can be essentially as small as Cackling. (And they also breed in high Arctic areas where they are not studied well). The key features separating the Cackling Geese (there are several subspecies) usually seen in our area are very stubby bills, blocky heads, darker breasts, often a good neck collar and in good light a mantle (back and folded wings) that looks frostier than nearby Canadas. A couple birds in the photos seem good, but there's a lot of variation among the smaller birds in this big group. A good thing to look for on smaller birds is whether the bill is truly stubby or just small because the bird itself is small and proportionally it doesn't look different from a Canada bill." Photos
Další druhy
Technické informace
- Model
- Canon EOS 5D Mark IV
- Objektiv
- EF100-400mm f/4.5-5.6L IS II USM +1.4x III
- ISO
- 1000
- Ohnisková vzdálenost
- 560 mm
- Blesk
- Flash did not fire
- Clonové číslo
- f/8.0
- Expoziční čas
- 1/640 sec
- Rozměry
- 1207 pixels x 805 pixels
- Původní velikost souboru
- 1.55 MB