The breastband of Common Ringed Plover may or may not be thicker than Semipalmated, but it always extends farther forward onto the throat, and the difference is most obvious in flight! With the recent spate of records of Common Ringed Plover across North America (August 2026 — including first state records for Minnesota, Arizona, and
A new clue for separating Common Ringed Plover from Semipalmated Plover Read More »
A new wall calendar using 16 of the full-page images from my book What It’s Like to be a Bird is now on sale. You can buy it at Bookshop.org (I earn a small commission) and get it personalized by ordering a signed bookplate.
2027 Calendar now on sale! Read More »
I no longer sell books directly through this website, so I can’t personalize books for you, but now I am pleased to offer signed bookplates at no cost as an alternative. A bookplate is a self-adhesive sticker that I can inscribe according to your instructions, and you can then paste it into any book. It’s an
New signed bookplates available Read More »
Male and female Chipping Sparrow are not exactly alike, and when viewing a mated pair the differences are usually clear. Compare the overall impression of “colorfulness” in these two illustrations, with the male (upper image) showing brighter white on eyebrow and throat, brighter and cleaner rufous crown, darker facial markings, cleaner gray breast, and more
Distinguishing male and female Chipping Sparrow Read More »
Looking at the different bill shapes of male and female American Avocet reveals other differences. An earlier version of this essay was published in *Birdwatching* magazine in 2022 I often say that I learn new things every time I go birding, and that the opportunities for learning will never end. One of the keys to
On being an active observer, with American Avocets Read More »
To separate Roseate Tern from the other expected species of terns just look at the upper margin of the folded wingtip (the inner edges of the primaries). Only Roseate Tern shows a conspicuous white edge, and it is present in all plumages and easily visible at a distance. Identifying terns is hard. The differences between
Use this one weird trick to identify Roseate Tern Read More »
Summary – A bird in sagebrush habitat showing features of Timberline (taverneri) Brewer’s Sparrow provides an opportunity to review the distinguishing features, and raises questions about range, variation, and taxonomic status. Comparing two subspecies of Brewer’s Sparrow Spizella breweri S. b. breweri often called Sagebrush Brewer’s Sparrow S. b. taverneri known as Timberline Sparrow On
An apparent Timberline Brewer’s Sparrow in sagebrush habitat Read More »
Detailing my new discovery that male and female Eastern Kingbirds are reliably distinguished by head shape – with the male having a more triangular head. This was verified across multiple birds in Montana, but needs further testing and might only work on adults. On a recent trip to Montana (June 2026) a pair of Eastern
Male and female Eastern Kingbirds have different head shapes Read More »
The Sibley Guide to Birds was published in 2000 – twenty-six years ago! I did a lot of touching-up of the original art for the second edition in 2014, but since 2020 most of my new work for the Sibley Birds app and other projects has been digital. I have decided to make some of
Original art from the Sibley Guide to Birds is now available Read More »
Following up on my earlier post about structural differences, here is a discussion about plumage differences between Mangrove and Northern Yellow Warblers. This post focuses on the two populations that are expected in Florida and the Caribbean – Mangrove Yellow Warbler (Greater Antillean group) and Northern Yellow Warbler (Eastern group). Other populations of both species
Identifying Mangrove and Northern Yellow Warblers in Florida and the Caribbean Read More »