MacGillivray's Warbler,  Geothlypis tolmiei

Number of accepted MacGillivray's Warbler records for Louisiana = 13 as of July 2015

Accepted Records

One first basic male (by plumage; 1959-04) on 15 November 1959, Plaquemines: ˝ mi. SE Buras; S. A. Gauthreaux (LSUMZ 23158) and Burt Monroe, Jr. (*).

One male (83-25) at Hackberry Ridge, west of Johnsons Bayou, Cameron Parish, on 30 April 1983 (Melvin Weber). This is another second state record, the first since 1959.

One (1985-64) on 15 Sep 1985, Cameron: Garner Ridge, 3 mi. W of Johnsons Bayou School; Steven W. Cardiff (LSUMZ 126898) and Donna L. Dittmann; AB40(1):129.

One (1985-97) from 26 Dec 1985-25 Jan 1986, Plaquemines: Venice; Steven W. Cardiff (LSUMZ 127072) and Donna L. Dittmann. Found during Venice CBC by Don Norman and David P. Muth; AB40(2):292.

The preceding two records were the third and fourth for Louisiana, and the second and third specimens, respectively.

One adult female (86-60) on 29 Apr. 1986, Cameron: HMBS; Douglas R. Willick, Brian E. Daniels.

One in female-type plumage (1987-09; formerly 89-95) on 20 Sep. 1987, Cameron: East Jetty Woods; Steven W. Cardiff (AB 42(1):90).

One (1990-30) on 5 May 1990, Cameron: approximately 5 mi. E of Cameron; Donna L. Dittmann and Steven W. Cardiff; AB44(3):443.

One adult male (93-22) on 23 Feb. 1993, Plaquemines: near Fort Jackson; Peter H. Yaukey and David P. Muth (AB 47(2):268). This is the seventh record for Louisiana.

One (2007-69) on 15 December 2007, Cameron: West Jetty; Paul E. Conover (ph). B. Mac Myers III was also involved in the discovery.

Photo by Paul E. Conover

One adult female (2010-21) on 24-27 April 2010, Cameron: Peveto Beach Woods, BRAS Sanctuary; Phillip A. Wallace, Rosemary Seidler (ph), Thomas A. Finnie (ph), Jennifer Alexander (ph only), Gay Gomez (ph only), Dave Patton (ph only), and B. Mac Myers III.

Photo by Dave Patton

One adult female (2012-041) on 9 December 2012, Plaquemines: E. bank Mississippi River, Perez Rd. X Hwy. 39; Phillip A. Wallace (ph), Robert D. Purrington, and David P. Muth (ph only).

Photo by Phillip A. Wallace

One second-year male (2014-055) netted and banded on 29 April 2014, Cameron: Johnsons Bayou; Will Lewis (ph).

Photo by Will Lewis

Unaccepted Records

One adult (1986-07; formerly 87-5) on 20 Dec. 1986 (SACBC), Cameron: Cameron, west side Hwy. 27 ferry landing at Natomes Road (Cardiff & Dittmann 1987, p. 561, 1039). The brief description did not eliminate Mourning Warbler. The species should be deleted from the Sabine CBC or it should be amended to reduce this species to "Oporornis sp.".

One male in alternate plumage (1996-37) on 27 Apr 1996, Cameron: Peveto Beach Woods. This is an interesting case in which the observer indicates that he "re-identified" a bird seen and identified as a Mourning Warbler (O. philadelphia) by others earlier the same day. With such a potential for controversy, the observer should have taken the opportunity to provide a more thorough analysis of the bird's appearance. Instead, the identification is based on the presence of "white [eye] crescents clearly seen," but unfortunately, there is no further elaboration about the white crescents and their size, shape, or boldness, etc. Although the observer may have been correct, the Committee deemed that not enough detail was available.

One (1999-86) on 25 Aug 1999, Gulf of Mexico: 138 mi. S of Cameron, Garden Banks 189A oil platform, 27o46'43˛N, 93o18'34˛W. This record involved a ten minute, relatively close range observation, but photographs were not obtained. And, despite the relatively leisurely observation, the description is fairly rudimentary and the observer does not note age or sex. This is surprising because the observer was experienced with western species, including MacGillivray’s Warbler. Unfortunately, the observer may have relied too much on how much his “experience” would count towards acceptance. Committee members were not inclined to fill-in missing details, and were not convinced that the description ruled out the much more likely Mourning Warbler. The record received a unanimous non-accept vote after two circulations.

One adult female (1999-100) on 5 September 1999, Gulf of Mexico: 122 mi. S Morgan City, Green Canyon 18A oil platform, N 27.943611o, W 91.029167o. The description was quite brief, and the discussion of eliminating similar species (especially other Geothlypis or Oporornis) focused only on the white eye crescents and that the bird hopped. Additionally, the bird was silent, and the observer was relatively inexperienced with similar species. Confronted with this combination of issues, a majority of Members chose not to accept the report.

One female (2013-073) on 12 April 2013, Cameron: Peveto Woods Sanctuary. The observer’s description was suggestive of this species, and there are a few accepted Louisiana spring occurrences. But, the brief description and lack of hard-evidence to support what would establish a new early date for the state ultimately convinced all Members to not accept the report.