Juvenile Bonaparte's Gull

Reports and Sightings from Further Afield

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Juvenile Bonaparte's Gull

Postby thouc » Sat Jul 29, 2017 10:27 pm

I saw a juvenile Bonaparte's Gull still with a lot of brown in its plumage at Earl Rowe Provincial Park near Alliston. I don't think I've seen a juvenile before, how unusual are they in Southern Ontario?

/Thomas
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Re: Juvenile Bonaparte's Gull

Postby Reuven_M » Sun Jul 30, 2017 8:35 pm

They only retain this plumage for a very short time. So only the very first returning first year birds will show this plumage. I saw 2 at Presquile yesterday, but I certainly don't see them very often.
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Re: Juvenile Bonaparte's Gull

Postby Dinusaur » Sun Jul 30, 2017 9:49 pm

Here's one photo that I took last year in early August in Nonquon Sewage Lagoon, Port Perry - there are two birds with a bit of brown plumage. Are they first year juveniles? That place gets a lot of Bonaparte's Gull.

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Re: Juvenile Bonaparte's Gull

Postby thouc » Sun Jul 30, 2017 10:39 pm

Yeah, they are first year birds transitioning from juvenile to first winter plumage.
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