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99 Western Screech-Owls the Hungry Bird—A Shrike Stash Colorado Field Ornithologists PO Box 929, Indian Hills, Colorado 80454 Cfobirds.Org Vol. 49 No. 4 Fall 2015 Colorado Birds The Colorado Field Ornithologists’ Quarterly Colorado's Breeding Bird Atlas II Grand Valley CBC—99 Western Screech-Owls The Hungry Bird—A Shrike Stash Colorado Field Ornithologists PO Box 929, Indian Hills, Colorado 80454 cfobirds.org Colorado Birds (USPS 0446-190) (ISSN 1094-0030) is published quarterly by the Col- orado Field Ornithologists, P.O. Box 929, Indian Hills, CO 80454. Subscriptions are obtained through annual membership dues. Nonprofit postage paid at Louisville, CO. POSTMASTER: Send address changes to Colorado Birds, P.O. Box 929, Indian Hills, CO 80454. Officers and Directors of Colorado Field Ornithologists: Dates indicate end of cur- rent term. An asterisk indicates eligibility for re-election. Terms expire at the annual convention. Officers: President: Doug Faulkner, Arvada, 2017*, [email protected]; Vice Presi- dent: David Gillilan, Littleton, 2017*, [email protected]; Secretary: Larry Modesitt, Greenwood Village, 2016, [email protected]; Treasurer: Michael Kiessig, Indian Hills, 2017*, [email protected] Past President: Bill Kaempfer, Boulder, 2016, [email protected] Directors: Christy Carello, Golden, 2016*; Lisa Edwards, Palmer Lake, 2017; Ted Floyd, Lafayette, 2017; Mike Henwood, Grand Junction, 2015*; Christian Nunes, Longmont, 2016*; Chris Owens, Denver, 2018* Colorado Bird Records Committee: Dates indicate end of current term. An asterisk indicates eligibility to serve another term. Terms expire 12/31. Chair: Mark Peterson, Colorado Springs, 2018*, [email protected] Committee Members: John Drummond, Colorado Springs, 2016; Peter Gent, Boulder, 2017*; Tony Leukering, Largo, Florida, 2015*; Dan Maynard, xxx, 2017*; Bill Schmok- er, Longmont, 2016; Glenn Walbek, Castle Rock, 2015 Past Committee Member: Bill Maynard Colorado Birds Quarterly: Editor: Peter Burke, [email protected] Staff: Christy Carello, science editor, [email protected]; Christian Nunes, photo editor, [email protected] Contributors: David Dowell, Dave Leatherman, Tony Leukering, Bill Schmoker Annual Membership Dues (renewable quarterly): General $25; Youth (under 18) $12; Institution $30. Membership dues entitle members to a subscription to Colorado Birds, which is published quarterly. Back issues/extra copies may be ordered for $7.50. Send requests for extra copies/back issues, change of address and membership renewals to [email protected]. Contributions are tax deductible to the extent allowed by law. COPYRIGHT © 2015 by Colorado Field Ornithologists. Reproduction of articles is permitted only under consent from the publisher. Works by U.S. and Canadian governments are not copyrighted. 166 Colorado Birds Fall 2015 Vol. 49 No. 4 The Colorado Field Ornithologists’ Quarterly Vol. 49 No. 4 Fall 2015 PRESIDENT’S MESSAGE ....................................... 168 Doug Faulkner ABOUT THE AUTHORS ......................................... 170 CFO BOARD MEETING MINUTES ......................... 172 Larry Modesitt CFO TRIP REPORT ................................................ 174 Mike Henwood ALEXANDER WILSON .......................................... 176 Robert Righter COLOROAD'S BREEDING BIRD ATLAS II ............. 180 Lynn Wickersham VAUX'S SWIFT: COLORADO'S 499TH SPECIES..... 183 Brandon Percival FULLY EXPOSED .................................................. 185 Bill Schmoker GRAND VALLEY CBC 2014 ................................... 189 Nic Korte CFO CONVENTION PAPERS .................................. 197 Christy Carello NEWS FROM THE FIELD: SPRING 2015 .............. 205 David Dowell 72ND REPORT OF THE CBRC ............................... 221 Mark Peterson, Bill Maynard COMPUTER MODELING TO IMPROVE FLOCK-SIZE ESTIMATES ...................................... 239 Eastern Alyssa H. Rawinski Screech-Owl, Poudre River, THE HUNGRY BIRD ............................................. 247 Larimer Coun- Dave Leatherman ty, 9 May 2013. Photo by Dave IN THE SCOPE ...................................................... 255 Leatherman Tony Leukering PRESIDENT’S MESSAGE CFO Provides Tools for Colorado Birders Doug Faulkner What do Short-eared Owl, Red-hooded Tanager, and Pale-naped Brush-Finch have in common? They’re all species that occur in Azuay Province, Ecuador, and they’re all species I did not see this past year. You see, my family and I just spent the past year living in Cuenca, Ecuador. Yes, Ecuador, the country that boasts the highest average number of species per square mile than any other in the world, roughly one species per 60 square miles, and I spent an entire 11 months primed to add a significant number of birds to my life list. Well, almost. Cuenca is a fairly large, modern city with a metropolitan population around 400,000. The city sits at about 8,000 feet elevation in a sprawl- ing Andean valley. Like any city of that size it is more concrete jungle than it is Amazonian rain- Doug Faulkner forest. The species list is paltry with perhaps 20 or so regular species to be found year-round. At least, that’s what it felt like from my experience. So, to do any serious birding I had to leave the city and that’s where I hit a snag. While living in a country the size of Colorado, but boasting around 1,660 species might sound ideal, I found it challenging to go it alone. The birding resources available are limited. Foreign birders rarely have the information they need to travel and bird with confi- dence by themselves – after all, that’s one reason why the bird guid- ing business is so robust. Sure, I could read about habitat preferences and elevational range limits for a particular species in a field guide or online, but those resources rarely give directions, helpful hints or much narrative describing anything useful to find the species by one- self. Without much for guidance, when I boarded that plane heading back to the States I did so knowing that, to paraphrase a popular gambling saying, I had “left birds on the table.” Now that I’m back in Colorado, I am delighted to have a readily available tool for birding the entire state – CFO’s County Birding website. If you haven’t taken the opportunity to peruse what it has to offer, I encourage you to put down this journal and get online immediately! Conveniently found under the Birding Resources tab 168 Colorado Birds Fall 2015 Vol. 49 No. 4 on the CFO website (www.cobirds.org) or on its own (www.colora- docountybirding.org), this site has everything I wish I’d had in Ecua- dor. In addition to providing species lists for each county, it also has pertinent and useful information about the best birding spots includ- ing directions, specific areas to search for target species and available amenities (restrooms, anyone?). And with BirdTrax from eBird, you can learn what other birders have found at that location to help you further prepare. I won’t try to convince you that this past year was anything but wonderful. It’s no secret that Ecuador is a spectacular country with huge birding potential. Going it alone, though, has its challenges. So while Colorado averages just one species per 208 square miles, with the Colorado County Birding website at hand, I’m confident that I won’t be leaving birds on the table. Snow and Ross’s Geese, North Sterling Reservoir, Logan County, 8 March 2015. Photo by David Dowell Colorado Birds Fall 2015 Vol. 49 No. 4 169 ABOUT THE AUTHORS Contributors News From the Field David Dowell is an outdoor enthusiast based in Longmont. When he isn’t hiking or birding, he’s working as a meteorologist at the NOAA Earth System Research Laboratory in Boulder, trying to make thunderstorm forecasts better. The Hungry Bird Dave Leatherman is a photographer, entomologist and expert on Colorado birds. He is a regular contributor to Colorado Birds as author of The Hungry Bird. His photographs of birds carry- ing food are of such high quality that many of the invertebrates can be identified to species. He obtained his B.S. from Marietta College and his M.S. from Duke University. When not birding, Dave has been known to occasionally enjoy a night on the town listening to live jazz. In The Scope Tony Leukering is a freelance ornithologist currently based in Florida. His primary interest in birds is migration, and his work has included nearly 14 years at the Rocky Mountain Bird Ob- servatory. He is a recipient of CFO’s Ron Ryder Award and has authored virtually all of the In The Scope columns for Colorado Birds. Fully Exposed Bill Schmoker is a middle school science teacher, is extremely active in the birding community and is a frequent photo con- tributor to Birding and other ABA publications in addition to a wide variety of books, magazines and other media. He authored the Geared for Birding column in the American Birding Asso- ciation’s Winging It newsletter and contributes to birding blogs for both ABA and Leica. He is involved with the ABA Young Birders program as a Camp Colorado and Camp Avocet instruc- tor and photo module judge for the Young Birder of the Year contest. Bill is an eBird reviewer and member of the Colorado Bird Records Committee and is a past president of CFO. 170 Colorado Birds Fall 2015 Vol. 49 No. 4 Featured Authors Alexander Wilson Robert Righter is co-author of Colorado Birds, Birds of Western Colorado and author of Bird Songs of Rocky Mountain States. He has lived in Colorado for 47 years, 34 of them as a CFO member. Colorado’s Second Breeding Bird Atlas Lynn Wickersham has worked as an avian ecologist for nearly 20 years, with a focus on reproductive ecology of Neotropical migratory birds. In addition to serving as senior avian ecologist with Animas Biological Studies in Durango, she’s also the State- wide project manager for the Second Colorado Breeding Bird Atlas. She developed a love of nature and birds as an under- graduate at Colorado State University, and has been fortunate to have studied and worked on a variety of bird research projects across the continental U.S. After the The Second Breeding Bird Atlas is published, Lynn has plans to take some much need rest and relaxation and go skiing and birding. 2014 Grand Valley Christmas Count: 99 Western Screech-Owls Nic Korte is a geochemist specializing in groundwater contami- nation issues.
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