Help with peeps

Need help identifying a bird? Please post your question here and if possible include a photo. Also let us know where and when you saw the bird. Other things that help are listing any field marks that stood out, behavioral information like how it walked, hopped or flew. This Forum is just for North American birds.
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Sbruenjes
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Help with peeps

Post by Sbruenjes »

I saw these birds today at Conaskonk Point in Monmouth County, NJ. I took a bunch of pics of semipalmated sandpipers, but Merlin is seeing these as white-rumped. I have absolutely no idea how to differentiate the two, so any help would be greatly appreciated. (On the last pic, Merlin sees the back bird as white-rumped..)
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Hooded Robin
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Re: Help with peeps

Post by Hooded Robin »

I also have trouble with these two species unless they help out by spreading their wings or flying.
I took a look at the Mac library to check the typical ID marks for breeding plumage and found the following:

Orange at base of bill: almost always found varying from very distinct (bright and a good length of the bill) to subtle and quite difficult to see. Fairly distinct in most cases.

Long wings, stretching beyond the tail: at the right angle usually clear, but not always.

Streaking on flanks: apparent in most cases but sometimes hidden. I looked at SESA for this and it seemed about 5% to 10% of them can also have this.

Longer body: sometimes apparent but depends on posture ( as in last photo).

The streaking on the flanks of these birds suggests White-rumped but I don't see any orange or paleness at the base of bill.

I'm hoping one of our more experienced birders can provide more insights.
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