Scotch Bonnet Island and Mohawk Island National Wildlife Areas Management Plan: appendix 1
| Date | Double-crested Cormorant | Herring Gull | Black-crowned Night Heron | Great Black-backed Gull | Source/Notes |
|---|---|---|---|---|---|
| 1938 | 6 | a | - | - | G. McKeating, unpubl. data; Baillie 1947 |
| August 1939 | 40 | - | - | - | G. McKeating, unpubl. data; Baillie 1947 |
| 18 July 1945 | 100 | - | - | - | G. McKeating, unpubl. data (DCCOs nesting, but not counted; 200 adults present) |
| 12 August 1946 | 134 | - | - | - | G. McKeating, unpubl. data (134 DCCO nests); Baillie 1947 (total DCCOs estimated at 200 breeding pairs, although only 134 nests counted) |
| 23 June 1950 | 154 | 500-600 | - | - | Francis 1950 |
| 1955 | - | nesting | - | - | Anonymous 1955 |
| 1972 | 5 | 145 | - | - | Canadian Wildlife Service(CWS), unpubl. data |
| 1973 | 2 | 188 | - | - | CWS, unpubl. data |
| 1974 | - | 109 | - | - | I. Price, pers. comm. |
| 1975 | - | 101 | - | - | CWS, unpubl. data |
| 29 April 1976 | 0 | 85 | 0 | 0 | Blokpoel 1977. (14 April - 10 May 1976; max. HERG nests = 85 on 29 April 1976; no nesting RBGUs, CATEs or COTEs); H. Blokpoel, unpubl. data |
| 25 May 1977 | 0 | 227 | - | - | G. Fox and C. Cooper, unpubl. data (7 visits, 16 April - 25 May 1977, no DCCOs observed); Hebert et al. 2008 |
| 24 May 1978 | 10 | 0 | - | - | G. Fox and C. Cooper, unpubl. data (6 visits, 02 May - 21 June 1978; max. count = 10 nests on 24 May 1978); C. Weseloh, unpubl. data |
| 18 June 1979 | 0 | - | - | - | G. Fox and C. Cooper, unpubl. data (7 visits, 18 April - 18 June 1979; DCCOs observed on 4 visits, but did not nest); C. Weseloh, unpubl. data |
| 1980 | 6 | 116 | 0 | - | CWS, unpubl. data (2 DCCO nests on 18 June 1980) |
| 1981 | 12 | 151 | - | - | CWS, unpubl. data (2 DCCO nests on 18 June 1980) |
| 1982 | 0 | 138 | - | - | C. Weseloh, unpubl. data |
| 1983 | 4 | 75 | - | - | C. Weseloh, unpubl. data |
| 1984 | 29 | - | - | - | - |
| 1985 | 0 | - | - | - | CWS, unpubl. data |
| 1986 | 0 | 168 | - | 1 | CWS, unpubl. data |
| 1987 | 0 | - | - | - | CWS, unpubl. data |
| 1990 | 2 | 204 | 27 | 1 | Blokpoel and Tessier 1996; Hebert et al. 2008 |
| 1991 | 0 | - | - | - | CWS, unpubl. data |
| 1992 | 0 | - | 23 | - | CWS, unpubl. data |
| 1993 | 260 | - | - | - | CWS, unpubl. data |
| 1994 | 586 | 124 | 17 | - | C. Weseloh, unpubl. data |
| 16 May 1995 | 59 | 246 | - | - | C. Hebert, unpubl. data |
| 14 May 1996 | 352 | 245 | - | - | L. Shutt, unpubl. data |
| 1997 | 303 | - | - | - | CWS, unpubl. data |
| 06 May 1998 | 520 | 206 | - | 2 to 4 | L. Shutt, unpubl. data |
| 1999 | 373 | 253 | 0 | 5 | Hebert et al. 2008 |
| 2000 | 635 | - | 0 | - | C. Pekarik and T. Havelka, unpubl. data |
| 27 April 2001 | 385 | 174 | - | 5 | C. Weseloh, unpubl. data |
| 25 June 2002 | 835 | - | - | - | C. Weseloh, unpubl. data |
| 22 April 2003 | 442 | 131 | - | - | C. Hebert, unpubl. data |
| 13 May 2004 | 940 | 137 | - | - | L. Shutt, unpubl. data |
| 5 May 2005 | 637 | 163 | - | - | C. Weseloh, unpubl. data |
| 04 May 2006 | 985 | 119 | - | - | L. Shutt, unpubl. data |
| 17 May 2007 | 722 | 125 | - | - | C. Weseloh, unpubl. data |
| 2008 | 901 | 113 | 0 | 0 | CWS, unpubl. data |
| 15 May 2009 | 896 | 81 | - | - | C. Hebert, unpubl. data (low because of storm loss) |
| 03 May 2010 | 759 | 128 | - | - | C. Hebert, unpubl. data |
a Blank fields indicate not known and/or not reported.