OB 18.1 1992 Spring
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$4.50 Oregon Birds m W The quarterly journal of Oregon field ornithology Volume 18, Number 1, Spring 1992 Status and Spread of the Cattle Egret in Oregon 3 JoeEvanich First Annual North American Migration Count, 9 May 1992 6 Breeding Birds of the Coast Range: A Comparison of the Species Mix in Successional Forest Communities in Polk County 7 RoyGerig Oregon Birds Crossword Puzzle No. 2 11 Karen Kearney MEMORIAM Martha Sawyer 12 Davids. Heir Matthew Hunter Alan Contreras FrederickE. Parker 14 Meredith Jones Alan Contreras FiederickN. Hamerstrom 14 Frances Hamerstrom News and Notes 15 SITE GUIDES Where to find a Grasshopper Sprarrow in Umatilla and Morrow Counties, Oregon 23 Paul T. Sullivan Cow Camp, Deschutes County 24 Mike Locating Three-toed Woodpeckers 24 DavidS. Herr Wildlife Disease Alert 25 FffiLDNOTES 26 Eastern Oregon, Summer 1991 26 JoeEvanich Western Oregon, Summer 1991 30 Jimfobnson Western Oregon Corrigendum 31 Cover photo Ruff, 23 September 1991, Agate Lake, Jackson County. Photo/James LUvaudais. Oregon Birds is looking for material in these categories: Oregon Birds News Briefs on things of temporal importance, such as meetings, binding trips, The quarterly journal of Oregonfield ornithology announce-ments, news items, etc. Articles are longer contributions dealing OREGON BIRDS is a quarterly publication of Oregon Field Ornithologists, with identification, distribution, ecology, an Oregon not-for-profit corporation. Membership in Oregon Field Ornithologists management, conservation, tax includes a subscription to Oregon Birds. ISSN 0890-2313 behavior, biology, and histoncai specs :i ornithology and birding in ~xrz: Editor Owen Schmidt ate references (if any) at the i Associate Editor Jim Johnson Names and addresses of ai3i>: Assistant Editor Sharon K. Blair appear at r.e be£r_~_-.; : r • Short Notes are dealing with the OREGON FIELD ORNITHOLOGISTS Short No-ts President David A. Anderson, Portland (1992) mcs:a:?-;-. Secretary Tim Shelmerdine, Lake Oswego (1992) Treasurer Dennis Arendt, Eugene (1992) the Past President Bill Stotz, Florence Directors Barbara Griffin, North Bend (1990-92) Bird Finding Goaies " s^tfre i find a Howard Sands, Eagle Point (1990-92) • Insi * xt ODE i ne rarer Gerard Lillie, Portland (1991-93) ~-~• : m the Don MacDonald, Corvallis (1991-93) " • r: setter OREGON BIRD RECORDS COMMITTEE : :egon Secretary Harry Nebls, Portland (1992) Members Jim Carlson, Eugene (1990-92) Photograph* : hotos Tom Crabtree, Bend (1992-94) taken recenirr i lu:<- slide Jeff Gilligan, Portland (1990-92) duplicates are p -•el all Jim Johnson, Portland (1990-92) photos with pbj _~: and Nick Lethaby, Beaverton (1991-93) address, bird tier :: lace Larry McQueen, Eugene (1991-93) the photo was be Owen Schmidt, Portland (1991-93) returned; conta Steve Summers, Klamath Falls (1992-94) informatioa Linda Weiland, Portland (1992-94) Deadline for the next issue of Cviz:-. Irx — Alternates Hendrik Herlyn, Corvallis (1992) 0B 18(2) — is 24 April 1992. The rec :x.e Kamal Islam, Corvallis (1992) should get to you by the first wee k d ] Ron Maertz, Glide (1992) Material can be submitted any time, and the Bob O'Brien, Clackamas (1992) sooner the better. Please send materials Craig Roberts, Tillamook (1992) directly to the Editor, 3007 N.E. 32nd Avenue, Portland, OR 97212, (503)282-9403. Oregon Birds Board of Editors: Oregon Birds David A. Anderson, Range D. Bayer, Charlie Bruce, Alan Contreras, Tom Crabtree, David OREGON BIRD RECORDS COMMITTEE Fix, Jeff Gilligan, Steven G. Herman, Mike ©1992 Houck, George A. Jobanekjim Johnson, CD. OREGON FIELD ORNITHOLOGISTS Littlefield, Roy Lowe, David B. Marshall, P.O. Box 10373 Harry B..Nehls, Mark Stern, Paul Sullivan, Eugene, OR 97440 Clarice Watson. Oregon Birds 18(1): 2, Spring 1992 Status and Spread of the Cattle Egret in Oregon JoeEvanich, 5026NE. Clackamas Street, Portland, OR 97213 The amazingly adaptable Catde Egret coast of South America) in 1880, 1887, Status in Western Oregon (Bubulcus ibis) has become one of the and 1892 (Hancock & Kushlan 1984). It The Catde Egret was first recorded in most recent additions to the official Or• is believed that there may still be a Oregon at Sauvie Island, Multnomah Co. egon state bird list. The species' spread continuing exchange of egrets from Af• on 29 Nov 1965. This individual, an from South America (and originally from rica to South America (and vice versa, immature, remained to be photographed Africa) is nothing short of phenomenal. depending on the wind, population con• and observed by many until 17 Jan 1966 Amazingly, there were no records of ditions, etc.). This is evidenced by nu• (Harry Nehls, pers. comm.). Another Cattle Egrets for the western United States merous recent records from the Canaries, Catde Egret was found near Coos Bay, before I960. By 1990, the species had Cape Verde Islands, St. Helena, Ascen• Coos Co. from 10-12 Dec 1970 (H. Nehls, been recorded in all 50 states and it is sion Island, and even mid-Adantic ships pers. comm.), and then the species went now a relatively common nesting bird in (Hancock & Kushlan 1984). unrecorded in Oregon until 1972, when many western states. Echoing this re• In the summer of 1941, the first Catde 1 appeared at Gold Beach, Curry Co. on markable world range expansion, the Egret was reported in the United States at 22 Nov (American Birds 27 106). Since Cattle Egret's increase in Oregon has Clewiston, Florida. By this time the 1972 the species has been recorded every been truly remarkable. species was well-established as a nesting year (mainly in late fall and winter) in resident throughout northern South increasing numbers. Spread of the Cattle Egret in the New World America and on many of the Caribbean Incidentally, Washington state re• The Catde Egret is apparendy a self- Islands (Sprunt 1955). Once the species corded its first Catde Egret on 30 Oct 1973 introduced species in the New World. reached Florida, it spread rapidly to the at the Skagit Wildlife Management Area Originally native to most of sub-Saharan north and west. The first North American near Mt. Vemon (an earlier sight record Africa and southern Spain and Portugal, nesting record came from southern Florida is also mentioned for the Long Beach the nominate race B. i. ibis is responsible in 1953 (Crosby 1972). Canada's first Peninsula in Dec 1969). Canada received for the New World populations (Hancock Cattle Egret was collected on 31 Oct 1952 its first Pacific Coast report that same year & Kushlan 1984). It is generally believed — on a ship in the Grand Banks, about when one reached the Sooke District of that birds originating in the vicinity of 300 miles off Newfoundland (Godfrey Victoria, British Columbia on 15 Nov (all Morocco or the Canary Islands crossed 1986). In 1964, the species finally reached American Birds 28: 93). the North Adantic in response to drought the Pacific Coast of the United States in Most of Oregon's Catde Egret records conditions, low food availability, or local San Diego County — California's first come from the immediate coast (54 of 92 overpopulation (Crosby 1972). If wind Catde Egret record (Crosby 1972). The records obtained from American Birds, conditions were favorable, these wan• species is now a common breeder in the Oregon Birds, other publications, or per• dering birds could be deposited in north• southern half of California, especially the sonal communications up to January ern South America or among the Carib• Imperial Valley. Finally, the Cattle Egret 1990). The species has been reported bean Islands. The first Catde Egret records was recorded in all 50 states when 4 were from all 7 coastal counties, and with the for the Western Hemisphere were found at Ketchikan, Alaska on 11 Nov exception of Tillamook Co., Catde Egrets sightings in Suriname (on the northeast 1981 (.American Birds 36: 207). are most common and most frequendy Oregon Birds 18(1): 3, Spring 1992 The species may also prove to be a rare (6+) More than 5 records post-breeding visitor to Eastern Oregon, as evidenced by the 3 current fall reports (see Table 2). Beginning about 1979, Catde Egrets were found summering at Malheur NWR. Most birds were found along the flooded north shore of Malheur Lake near the town of Lawen. Finally, on 9 July 1982, Oregon's first Cattle Egret nest was discovered in the marshes along the north shore of the lake. The nest contained 5 unfledged young. It was isolated from the main nesting colonies of Double-crested Cor• morants, Great Blue Herons, and Great and Snowy Egrets (Thompson & Paullin 1985). Apparendy the species nested on the lake again, at least in 1984 (LitrJefield 1990) and 1985 (OregonBirds \2 129). Cattle Egrets have been present in the Hamey Basin during the summers of 1974,76,77,79,80.82.84.85,87,88, and 89. The largest concentnnon (other than the above nesting record- wis 6 birds at Figure 1. Cattle Egret distribution in Oregon. Knox Pond on Malheur NWR on 21 May reported in the southern coastal counties. Western Oregon. Nearly all inland re• 1987. There is an atypical number of records ports fall within the same Nov-Jan occur• from the meadowlands around the town rence of the species along the coast. One Conclusion of Tillamook and Nehalem Meadows (at record, however, is a true anomaly: 1 bird The Carrie rjf ihwtwi nun of very least 17 records). was seen by a number of birders at the few species whose f-—* and coloniza• The Cattle Egret is proving to be a Forest Grove sewage ponds, Washington tion of Oregon has been very closely regular late fall and winter visitor in Co. on the odd date of 27 June 1984. monitored. It shouidserve as a model for Western Oregon.