fkm 27/12/2013 11:38
How old is this WBSE?
This looks like a bird not yet fully grown. I once read it takes them several years (7?) to moult into full adult plumage, may I know how old this one probably is?
2013.12.26 Sai Kung Public Pier
[img]https://fbcdn-sphotos-g-a.akamaihd.net/hphotos-ak-ash3/1490660_771787936171680_2109966350_o.jpg[/img]
tsheunglai 27/12/2013 21:12
Second-year bird according to Ferguson-Lees', well-advanced to 3rd, I believe.
S L Tai
gary 27/12/2013 21:29
Yes, a juenvile born last year (2012).
WBSE takes about 6 years to attain full adult plumage.
fkm 29/12/2013 00:39
Thank you SL and Gary for your kind advices!