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ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

Recent content by Andrew Spencer

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    Clements 2023 Checklist Update

    I advocated for "Inconvenient Egret" when I was asked.
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    Latest IOC Diary Updates

    I was curious, so I pulled a list of every species in Clements taxonomy that has "Lesser" in the name. 45 total, 21 Old World, 24 New World.
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    What is a species?

    I personally am very skeptical about the supposed vocal differences. A number of the supposed "Thayer's Gull" recordings available online are, IMO, mis-identified. Of the ones I am certain about the ID of, the long calls are identical to those from Kumlien's Gull from the eastern US. Obviously a...
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    Clements 2021 Update Coming!

    As has been pointed out before, the update is NOT done yet, so it is likely that these and many of the other records that have been discussed recently are still to be reassigned.
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    Lynx-BirdLife Taxonomic Checklist

    I'll admit I find it hard to believe that anyone can take the Lynx-Birdlife Taxonomy seriously. Seems riddled with poor decisions, inconsistent reasoning, and a deeply flawed methodology.
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    Pine Flycatcher

    I probably should have written more about this in the blog, though the taxonomic aspects of Pine Flycatcher were not the main purpose of the posting. The vocalization referenced by Farnsworth & Lebbin appear to be the "du-hic-type" call that I mention in the blog, NOT the song. There are...
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