Date: 2/10/18 6:22 am
From: Michael Lamson <michael.a.lamson...>
Subject: [cobirds] Re: Hybrid ducks mystery
If you tour the livestock exhibit at the county fair, these are called "colored runners".

On Wednesday, February 7, 2018 at 3:19:58 PM UTC-7, Karen Strong wrote:
> Please forgive my ignorance - I'm a brand new birder & have only been observing for a little over a month.
>
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> I saw these ducks yesterday (2/6/18) in the pond in Prospect Park, Wheat Ridge.  My best guess is that they are Mallard-Northern Shoveler hybrids.  They resemble male Mallards, in that they have green heads, yellow bills, and those curly "butt" feathers (I'm sure there's a more proper term for those).  But they were significantly larger than a Mallard they paddled by - they were about the size of a cackling goose that was also nearby.  And then there are those white chest markings.  Northern Shovelers have white chests, and the front duck's bill definitely looks Shoveler-like in shape.  But Northern Shovelers are even smaller than Mallards.  Could the offspring of a Mallard-N. Shoveler mating be larger than either species?  Do these species even "commingle"?
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> Thanks to anyone who can enlighten me!
>
>
> Karen Strong
> Conifer, CO

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