Here's a 2011 overview of the experts on ageing and sexing Snowies. Basically it says you can guess that all white birds are adult males, or that real dark birds are juve females, but you won't always be right.
-- http://www.dvoc.org/OrnithStudy/Presentations/Presentations2012/Snowy%20Owl%20plumages.pdf.
On Wednesday, February 5, 2014 10:18:40 AM UTC-5, michael.smith wrote:
http://sora.unm.edu/sites/
default/files/journals/jfo/ v051n02/p0149-p0160.pdf
This paper outlines the basic criteria for aging/sexing Snowy Owls – per the request yesterday regarding Trenton bird.
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Michael Smith MS GISP
State GIS Manager, Maine Office of GIS
State of Maine, Office of Information Technology
michael.smith _at_ maine.gov 207-215-5530
Board Member, Maine GeoLibrary
Education Chair, Maine GIS Users Group
State Rep, National States Geographic Information Council
State House Station 145
51 Commerce Drive
Augusta, ME 04333-0145
69o 47' 58.9"W 44o 21' 54.8"N
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