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Warbler sps Mt Charleston, NV - September 23, 2015

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Old Sunday 9th September 2018, 02:54   #1
lvcuer
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Warbler sps Mt Charleston, NV - September 23, 2015

Three years ago I took photos of this warbler and identified it as a Nashville Warbler. Tonight, reviewing the photos, (and with 3 years more birding experience) I am not certain that is a correct ID. I would be very interested in anyone else's opinion. All I have are these 2 photos. Thanks.
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Old Sunday 9th September 2018, 04:09   #2
fugl
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You’re thinking Connecticut, I imagine? Certainly not a Nashville. . ..

What was the time of year?
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Old Sunday 9th September 2018, 04:14   #3
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Yes, admittedly, I was thinking Connecticut. Time of year was late September. But it's a rarity in Nevada. Thanks
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Old Sunday 9th September 2018, 04:19   #4
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Well, looks good for Connecticut to me. . ..
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Old Sunday 9th September 2018, 05:20   #5
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Looks very like a Connecticut, but do you have any other photos? Something from the side that shows the relative lengths of the tail and undertail coverts might nail it down.
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Old Sunday 9th September 2018, 08:23   #6
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I've only seen a single Connecticut Warbler (briefly), however that bold "complete" contrasting eye-ring (is still indelibly etched). I believe this feature is strongly supportive of CW. Looking at the 2nd image which clearly shows where the overlying tertials end, might just suggest that the primary projection is much longer than the (fore-shortening) shows.

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Old Sunday 9th September 2018, 17:21   #7
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This is definitely a Connecticut Warbler.
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Old Sunday 9th September 2018, 17:32   #8
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After doing a massive image search in Google, I agree on Connecticut Warbler.
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Old Sunday 9th September 2018, 18:34   #9
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Looks good for Connecticut to me, too.
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Old Tuesday 11th September 2018, 15:30   #10
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After looking at several resources on the identification of Connecticut and similar warblers, I am still not entirely sure about the i.d. of this bird. Some aspects, particularly the pale supraloral line that this bird has, are said never to occur on Connecticut Warbler and would suggest it may be a Mourning Warbler. Whatever the case, I would encourage you to submit the sighting to the Nevada Bird Records Committee, which you can do at this site: https://www.gbbo.org/submit-sightings-1/. Both Connecticut and Mourning Warblers are very rare in Nevada and on their review list; I am sure they would be interested in your bird. At the least, you should get some more expert opinions on the identity of the bird.
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Old Tuesday 11th September 2018, 17:52   #11
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Thank you for weighing in. I'm waiting to hear from a local Las Vegas birder who is also sharing the photos with friends. I've considered submitting it to the NBRC.
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Old Wednesday 12th September 2018, 03:03   #12
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I am struggling to eliminate MacGillivray's Warbler from these images. I will admit the eye-ring looks pretty complete. However, it looks very bright yellow below and somehow the shape doesn't look right to me (not rotund enough or short-tailed) for Connecticut in the second image (though there is much to desire in regards to angle in that image).

Could someone provide some other strong evidence against MacGillivray's?
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Old Thursday 13th September 2018, 18:58   #13
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Quote:
Originally Posted by birdmeister View Post
I am struggling to eliminate MacGillivray's Warbler from these images. I will admit the eye-ring looks pretty complete. However, it looks very bright yellow below and somehow the shape doesn't look right to me (not rotund enough or short-tailed) for Connecticut in the second image (though there is much to desire in regards to angle in that image).

Could someone provide some other strong evidence against MacGillivray's?
From Dunn and Garrett's A Field Guide to Warblers of North America "All MacGillivray's show evident white or whitish eye-arcs that are relatively thick and blunt, never forming a complete ring." I discounted MacG based on that - this bird has a pretty complete eye ring. Other features, such as the complete gray breast band do seem better for MacG, but may be possible for Mourning. Like, I suspect, most birders, I do not have much experience with all of these species, so I don't really know how to weigh the different characteristics.
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Old Saturday 15th September 2018, 00:48   #14
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Firstly, I've not seen Connecticut, but not for the want of trying. However, as one of my most wanted US birds and the last remaining warbler, I was always under the impression that Connecticut should exhibit very long undertail coverts which extend two-thirds of the length of the tail, giving a more rotund appearance, which this bird doesn't seem to show. Shape wise, is it not surely a better fit for Mourning or MacG? Certainly an interesting bird.

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