Re: [SBB] Canada Goose - What's wrong with this picture?

[Lisa Myers <[[email protected]]>]

Hello Vivek - 

I remember when my goal was simply to remember to call
this goose a Canada Goose and not a Canadian Goose,
let alone try a learn all the subspecies.

Last year in Les Chibana's Palo Alto class he spent
two nights of lectures going over all the sub-species
of the Canada Goose.  
Below is a list of what I quickly found on the
internet.

Subspecies: Branta canadensis canadensis
Subspecies: Branta canadensis fulva
Subspecies: Branta canadensis hutchinsi
Subspecies: Branta canadensis interior
Subspecies: Branta canadensis leucopareia
Subspecies: Branta canadensis maxima
Subspecies: Branta canadensis minima
Subspecies: Branta canadensis moffitti
Subspecies: Branta canadensis occidentalis
Subspecies: Branta canadensis parvipes
Subspecies: Branta canadensis taverneri

So I suspect your pair is a combination of two
different subspecies.
I also suspect more information is coming our way.

Lisa Myers

--- "Tiwari, Vivek" <[[email protected]]> wrote:

> Took the following photograph in Alviso on May 1st.
> 
> http://www.flickr.com/photos/30419272@N00/144705030/
> 
> Two (presumably) adult Canada Geese with chicks. 1
> chick visible at
> bottom of the picture
> 
> If so, why the big difference in size in the two
> "adult" birds? 
> Is this a pair? Is there sexual dimorphism in this
> species? Are these
> different subspecies?
> 
> If not a pair, is the smaller, slender bird an
> immature from an ealier
> year/brood? 
> 
> Or just a perfectly normal variation, nothing
> strange here?
> 
> Don't know if its relevant but the smaller / slender
> bird appeared to a
> bare patch of the forehead as seen here:
> http://www.flickr.com/photos/30419272@N00/144711875/
> A sick bird?
> 
> Thanks!
> 
> Vivek Tiwari
> 
> 
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