Cory's Shearwater,  Calonectris diomedea

Number of accepted Cory's Shearwater records for Louisiana = 29 as of June 2017

By number of records


By number of individuals recorded

Accepted Records

One (1997-28) on 13 Sep 1997, Gulf of Mexico: approx. 35 mi. S of Southwest Pass Mississippi River, 28o 39’ N, 89o 30.2' W; Daniel F. Lane (sketch), John P. Sevenair [ph in FN 52(1): 72], R. D. Purrington, M. J. Babin (ph), B. Mac Myers III, Joseph P. Kleiman (ph), and Phillip Wallace (ph); FN 52(1): 72 (locality given as “20 mi. SSW….”).

Photo by Dan Purrington

One (1998-03) on 13 Jun 1998, Gulf of Mexico: 36 mi. SSE of South Pass Mississippi River; John P. Sevenair (ph), Dave Patton (ph), and Joseph P. Kleiman (ph).

Photo by Dan Purrington

One (98-04) on 13 Jun 1998, Gulf of Mexico: 58 mi. SSE of South Pass Mississippi River; Dave Patton (ph), John P. Sevenair (ph), and Joseph P. Kleiman (ph). This and the preceding record appear in FN 52(4): 466.

Photo by Dan Purrington

Two (1998-72) on 15 Sep 1998, Gulf of Mexico: 138 mi. S of Cameron, Garden Banks 189A oil platform, 27o46'43²N, 93o18'34²W; Jon R. King; NAB53(1):62.

One (1998-137) on 2 October 1998, Gulf of Mexico: oil platform at South Marsh Island 147, 28o 13’ N, 92o 01’ W; Brian Gibbons.

One immature female (1998-133) on 13 Oct 1998, Gulf of Mexico: about 24 mi. S of South Pass Mississippi River, 28 o 38’ 98” N, 89o 04’ 65” W; Steven W. Cardiff and Donna L. Dittmann (LSUMZ 165965; DLD); NAB 53(1): 62. This represents the first “whole” specimen for Louisiana.

Two (1999-88) on 30 Aug 1999, Gulf of Mexico: 122 mi. S of Morgan City, Green Canyon 18A oil platform, 27o56'37²N, 91o01'45²W; Marshall J. Iliff; NAB54(1):61.

One (1999-89) on 3 Sep 1999, Gulf of Mexico: 61 mi. S of East Timbalier Island, Ewing Banks 826 oil platform, 28o09'48"N, 90o21'31"W; B. Mac Myers III; NAB54(1):61.

One (1999-90) on 5 October 1999, Gulf of Mexico: Mobil oil platform at Green Canyon 18A; Marshall J. Iliff.

One (01-14) on 29 Jun 2001, Gulf of Mexico: 33 mi. SSE of South Pass Mississippi River, 28o 37’ 46” N, 88 o 51’ 39” W; John P. Sevenair, Charles E. Lyon (ph), and Donna L. Dittmann; NAB 55(4): 442.

One (2000-81) on 12 Jul 2000, Gulf of Mexico: ca 50 mi. SSE of mouth South Pass of Mississippi River; 28o12'N, 89o07'W; Phillip A. Wallace (ph) and Donna L. Dittmann; NAB54(4):391.

One female (2003-09) on 24 Jun 2003, Gulf of Mexico: 40 1/2 mi. S of mouth South Pass of Mississippi River, 28o40'20.2"N, 88o34'57.7"W; Steven W. Cardiff (LSUMZ 173610) and Donna L. Dittmann (*); NAB57(4):502.

One male (2003-10) on 9 Jul 2003, Gulf of Mexico: approximately 36 mi. S of mouth South Pass of Mississippi River, 28o32'07.3"N, 88o52'07.5"W; Steven W. Cardiff (LSUMZ 173611) and Donna L. Dittmann (*). One of two birds reported in NAB57(4):502.

Two, one immature male and one immature female (2003-40), on 7 Oct 2003, Gulf of Mexico: 34.4 mi. S of mouth South Pass of Mississippi River, 28o37'16.1"N, 89o29'31.6"W; Steven W. Cardiff (LSUMZ 173807-173808) and Donna L. Dittmann (*); NAB58(1):89.

One (2009-60) on 27 September 2009, Gulf of Mexico: on rip line at Mississippi Canyon, ca. 34 mi. (28 nm) SW of mouth Southwest Pass, 28o 32’ 12.0”N, 89o 47’ 09.9”W; John P. Sevenair (ph), Devin Bosler, and Dave Patton (ph).

One (2011-048) on 25 September 2011, Gulf of Mexico: vicinity of Mississippi Canyon; John P. Sevenair (ph), Erik I. Johnson, Dave Patton (photos only), and Robert D. Purrington (photos only).

Photo by Dave Patton

One male (2012-115) on 14 August 2012, Gulf of Mexico: 46 mi. S mouth Southwest Pass Mississippi River, N28.26262o, W89.35269o; Steven W. Cardiff (LSUMZ 185530) and Donna L. Dittmann (DLD10598).

One male (2012-117) on 14 August 2012, Gulf of Mexico: 46 mi. S mouth Southwest Pass Mississippi River, N28.26262o, W89.35269o; Steven W. Cardiff (LSUMZ 185531) and Donna L. Dittmann (DLD10599).

One male (2012-121) on 14 August 2012, Gulf of Mexico: 46 mi. S mouth Southwest Pass Mississippi River.). N28.26262o, W89.35269o; Steven W. Cardiff (LSUMZ 185532) and Donna L. Dittmann (DLD10600).

One female (2012-123) on 14 August 2012, Gulf of Mexico: 46 mi. S mouth Southwest Pass Mississippi River, N28.27215o, W89.36317o; Steven W. Cardiff (LSUMZ 185526) and Donna L. Dittmann (DLD10564).

One female (2012-116) on 14 August 2012, Gulf of Mexico: 35 mi. S mouth Southwest Pass Mississippi River, N28.42282o, W89.46610o; Steven W. Cardiff (LSUMZ 185527) and Donna L. Dittmann (DLD10565).

One male (2012-120) on 14 August 2012, Gulf of Mexico: 35 mi. S mouth Southwest Pass Mississippi River, N28.41905o, W89.44571o; Steven W. Cardiff (LSUMZ 185525) and Donna L. Dittmann (DLD10563).

Two males (2012-119) on 14 August 2012, Gulf of Mexico: 47 mi. S mouth Southwest Pass Mississippi River, N28.24936o, W89.35320o; Steven W. Cardiff (LSUMZ 185528, 185529) and Donna L. Dittmann (DLD10569, 10597).

One female (2012-118) on 14 August 2012, Gulf of Mexico: 28 mi. SW mouth Southwest Pass Mississippi River, N28.6644o, W89.76315o; Steven W. Cardiff (LSUMZ 185523) and Donna L. Dittmann (DLD10561).

One female (2012-122) on 14 August 2012, Gulf of Mexico: 28 mi. SW mouth Southwest Pass Mississippi River, N28.6644o, W89.76315o; Steven W. Cardiff (LSUMZ 185524) and Donna L. Dittmann (DLD10562).

Two (2016-025) on 10 September 2016, Gulf of Mexico: 17-21 mi. SE South Pass Mississippi River, N28.80º, W88.93 º; Robert C. Dobbs (ph) and Oscar Johnson (ph).

Fourteen (2016-026) on 10 September 2016, Gulf of Mexico: approximately 22 mi. SE South Pass Mississippi River, N28.73 º, W88.88º; Robert C. Dobbs (ph) and Oscar Johnson (ph).

Six (2016-027) on 10 September 2016, Gulf of Mexico: approximately 16 mi. SE South Pass Mississippi River, N28.79º, W88.07º; Robert C. Dobbs (ph) and Oscar Johnson (ph).

One (2016-055) on 10 September 2016, Gulf of Mexico: approximately 10 mi. SSE South Pass Mississippi River, N28.83º, W89.12º; Oscar Johnson (ph).

Pertaining to records 2012-115 through 2016-055: Regardless of the level of taxon each record was submitted as (e.g. identified to subspecies C. d. diomedea or C. d. borealis) all Cory’s Shearwaters accepted above are accepted only to the level of ‘Cory’s Shearwater complex,’ which may include Cape Verde Shearwater (C. edwardsi). The committee will re-address accepted specimen and photographic records at a later time when definitive information is available to more confidently identify these taxa. Specimens of both nominate diomedea and borealis have been obtained in Louisiana waters, but “intermediates” have also been reported in U.S. waters. For more information see Howell (2012) and Howell and Patteson (2008).

Unaccepted Records

One (1998-71) on 23 Aug 1998, Gulf of Mexico: 138 mi. S of Cameron, Garden Banks 189A oil platform, 27o46'43²N, 93o18'34²W. All but two members believed that the distance (1 ½ -2 ½ mi.) was too great, even with a 30X scope, to allow close enough study to observe necessary details to eliminate other species (especially Greater Shearwater) from consideration.

One (1998-70) on 27 Oct 1998, Gulf of Mexico: 61 mi. S of East Timbalier Island, Ewing Banks 826 oil platform, 28o09'48"N, 90o21'31"W. Although most members believed this report probably did involve this species, all but two indicated that details provided were insufficient.

One (1999-087) on 27 August 1999, Gulf of Mexico: 122 mi. S Morgan City, Green Canyon 18A oil platform, N 27.943611o,W 91.029167o. The bird was reported to have been over a mile away and seen only briefly, and the identification was largely based on flight style and general coloration. There was no discussion of wind conditions, which could have affected flight behavior. All Members were reluctant to accept the record because the identification was largely based on probability and other shearwater species could not be decisively eliminated.