Colaborador
Data
Localização
- Idade e sexo
- Imaturo, Sexo desconhecido - X
Notas sobre o média
This photo (taken at 1:22 PM) an important one because it clearly shows that the underside (breast and belly) of this individual are not fully clothed in the bright rufous feathering of adult plumage. It shows, instead, that such rufous areas are interlarded with areas still evincing the dark-on-light barring found in immatures of this species. Specifically, the adult-plumage-discordant barred plumage is shown here in (a) the upper breast (finer barring); (b) median lower breast (coarse barring); (c) upper belly (coarse barring); and (d) lower belly (medium-coarse barring; only right side visible here). Additional evidence of less than full maturity (i.e., less than full adulthood) may be found in discussion of one or more of the other photos herewith. The reason for the huge neck stretch was that the heron was using a "gravity helps" strategy in a continued effort to get fully down its esophagus the large Hispid Cotton Rat that it had captured and killed at about 1:09 PM.
Detalhes da observação
Based upon study of my photographs and review of my field notes, this individual exhibited somewhat less than full adult plumage, although it had mainly adult features. Nonetheless, I believe that labeling it (below) as adult might be misleading as to its actual plumage state (indicating age), so I am listing it below as "immature." PLEASE NOTE: In discussing below my photos I will point out specific features indicating that this individual evinced less than full adulthood, fully recognizing, though, that most of its features were like those of adults. I will, using this set of photos, also document this bird's capture and ingestion of a Hispid Cotton Rat and will supplement that by providing some visual observations of this heron obtaining and consuming its New Year's Day feast. This Bare-throated Tiger-Heron initially was found (and reported) on December 21, 2009 by R. Nirschl and R. Snyder. Publicity concerning this first-ever (USA) finding brought many birders to this state park to search for it. The present report concerns my own fifth effort to find and photograph it. A few days before this I had had a very brief sighting of a bird in flight, near day's end, that closer birders had affirmed was this desired species, but from my greater distance, seeing the bird briefly in flight in low-level light was inadequate for definitive personal identification and for photography.
Informação técnica
- Modelo
- Canon EOS 10D
- ISO
- 400
- Distancia focal
- 285 mm
- Flash
- Flash did not fire
- f-stop
- f/11.0
- Velocidade do obturador
- 1/1000 sec
- Dimensões
- 410 pixels x 905 pixels
- Tamanho do ficheiro original
- 172.34 KB