Wednesday, February 13, 2019

The updated Dearborn bird checklist

I've now put up a revised version of the Dearborn bird checklist incorporating changes through 2018. A link is also in the sidebar.

This checklist complies with all taxonomic changes made by the American Ornithologists’ Union to the 7th edition of the AOU Check-list of North and Middle American Birds, through the 59th Supplement, published in 2018.

The Dearborn bird checklist contains 263 species plus two hypothetical species, most of which were recorded on the University of Michigan-Dearborn (UMD) campus and adjacent green space. Records were compiled from over 50,000 banding records from programs that took place on the UMD campus (from 1971-1987, and 1992-2014 as the Rouge River Bird Observatory) and elsewhere in the city; thousands of standardized surveys, mostly by RRBO; published historical records, archived photographs, and documentation; and other material determined to be credible. Links to supporting information on some of the more interesting species are included in the checklist below.

If you are interested in the residency status, relative abundance, dates of occurance, and sighting locations of these species, detailed information, plus a guide to birding in Dearborn, references, article reprints, and data tables is in the book The Birds of Dearborn, An Annotated Checklist, published in 2007. A PDF is available for only $7.

I am currently considering work on a complete update of the annotated checklist portion of this book. It would include details on over a dozen new species recorded since 2007, hundreds of new dates on arrivals, departures, etc., and dozens of status changes.

If there is sufficient interest from people that would like to purchase a copy of an updated annotated checklist I can determine how much it will cost me to produce a final self-published PDF. It would likely be around $5-8. It would not include all the maps, detailed location information, and appendices of the currently published book. If you think you are interested, leave a comment on the form in the sidebar (just as feedback, no commitment!) or on the Facebook page so I can determine what to do. Please let me know your thoughts!

Monday, February 11, 2019

White-tailed Kite and King Rail in Dearborn: Hypothetical

NOTE: In anticipation of publishing a new Dearborn bird checklist, I am posting information on some of the city's more interesting sightings. 


There are a couple of hypothetical species on the Dearborn checklist, significant records that should really require further documentation to include in the list.

One is for White-tailed Kite (Elanus leucurus), seen on the University of Michigan-Dearborn campus on 15 May 1999 by a reliable observer.  His report is below:
On May 15, 1999 at approximately 12:30PM I observed a falcon shaped bird soaring and with intermittent flapping as it proceeded to climb starting at approximately 200 feet when first seen.  The first thing I noticed on this bird was the extremely light underparts with the secondaries lighter than the primaries and dark wrist marks and the tail length which set this bird apart from a gull.  The falcon shaped wings left no doubt that this was not a buteo.  Size of this bird was about that of a broad-winged hawk but appeared wider from wing tip to wing tip.  No distinguishing marks on underside of tail, appeared pure white.  Wings just slightly uplifted while soaring and banking.  After observing for approximately 5 minutes I dropped my glasses to see how high the bird had climbed.  By this time it was a mere dot in the sky, having moved up and north.  Prior to this I had noticed the bird banking and alternately flapping in a nighthawk like flight as if feeding on the wing.  In my recollection of white-tailed kites from seeing them in CA I don’t recall seeing this form of feeding.  Wingbeats were buoyant yet strong and coming high up as a nighthawk.  Viewing was optimal as the sun shown through the wings.
There are no records in Michigan for White-tailed Kite. Since the mid-1990s there have been increasing numbers of sightings in the eastern U.S., but the majority of the northernmost reports have been in the past 5 or so years and many are west of Michigan. This is a distinctive bird and a good description, but the single-observer report at a time when not many of these birds were noted in the region has prompted me to consider it hypothetical.

White-tailed Kite in California. Photo by Lee Jaffe under a
Creative Commons license.

The other hypothetical species is King Rail (Rallus elegans). The only mention I have of this species for Dearborn is from various reports from around 1911-1914 regarding the efforts of Henry Ford to create bird habitat on his land. At the time, he owned around 2,000 acres. In the location where he would build his Fair Lane estate beginning in 1914 he went whole-hog with feeding stations, fruit tree plantings, winter shelters, bird houses, and even a heated bird bath. Jefferson Butler, then president of Michigan Audubon, performed a number of bird surveys on the property at the time, and Ford's efforts were promoted by Butler (and no doubt Ford himself). A dam was constructed across the Rouge River at the site of Fair Lane in order to provide electricity; the adjacent powerhouse was on of the first structures on the site. Several reports in the popular press noted that areas upstream from the dam flooded, and about a mile upstream King Rails were mentioned as present.

King Rails are considered endangered in Michigan, but was much more common during that period. However, there are no details, dates, or formal reports on this species on the Ford estate so I leave it at hypothetical.