Arthur Kill Wader Colonies
Total Page:16
File Type:pdf, Size:1020Kb
NYC Audubon Harbor Herons Program 34th Annual Survey Wading Bird, Cormorant, and Gull Nesting Activity in 2018 Tod Winston1, Susan Elbin1 1) NYC Audubon Harbor Herons Annual Subcommittee Meeting: Greater NY/NJ Harbor Colonial Waterbirds Working Group December 12, 2018 Acknowledgements Study PI: Susan Elbin Numerous collaborators and volunteers: • Fieldwork! Novem Auyeung, Ryan Baker-Urzua, John Burke, Ariel Cordova-Rojas, Georgina Cullman, Susan Elbin, Willis Elkins, Michael Feller, Carla Garcia, Andrew Garn, Stefan Guelly, Dave Kunstler, Marit Larson, Melissa Malloy, Rita McMahon, Kaitlyn Parkins, Ellen Pehek, Don Riepe, Robin Rodier, Lisa Scheppke, Brady Simmons, David Spawn, Alex Summers, Emilio Tobón, Gerardo Vildostegui • Permits and administration! Dana Filippini, George Frame, Kathy Garofalo, Marit Larson, Joe Pane, Ellen Pehek, Dave Taft • American Littoral Society/Jamaica Bay Guardian • Huckleberry Indians • National Park Service • Newtown Creek Alliance • NJ Audubon • NYC Parks and Recreation • USDA/APHIS • Wild Bird Fund Acknowledgements NYC Audubon’s Conservation Programs are made possible by the leadership support of the Leon Levy Foundation. Support for the Harbor Herons Nesting Surveys is provided by Elizabeth Woods and Charles Denholm, individual contributions from NYC Audubon’s major donors, and the New York State Department of Environmental Conservation. Survey Area May 15-June 26, 2018 # of Location Surveyed Date Observers Ownership Long Island Sound Goose Island 24 May 4 NYC DPR Huckleberry Island 24 May 5 Huckleberry Indians, Inc. East River South Brother Island 21 May 10 NYC DPR Mill Rock 21 May 4 NYC DPR U Thant 29 May 3 NYC DPR Arthur Kill-Kill Van Kull Shooters Island 14 May 2 NYC DPR Prall’s Island 15 June 2 NYC DPR Isle of Meadows 22 May 2 NYC DPR Lower New York Bay Swinburne Island 20 May 4 NPS Hoffman Island 20 May 4 NPS 23 May 6 NPS Jamaica Bay Elders Point East 15 May 6 NPS Elders Point West 30 May 2 NPS Subway Island 15 May 6 NPS Little Egg Marsh 15 May 6 NPS Mainland – Far Rockaway Redfern Houses 28 May 2 NYC Housing Authority Hammels Houses 28 May 2 NYC Housing Authority Mainland – New Jersey Harmon Cove 26 June 3 Harmon Cove Wading birds of the NY/NJ Harbor Islands Out of 10 historically nesting species of long-legged waders: 7 species observed nesting on 8 of 15 surveyed islands in 2018 1-2 species nesting only only at mainland sites Black-Crowned Night-Heron, Nycticorax nycticorax Great Egret, Ardea alba Snowy Egret, Egretta thula Glossy Ibis, Plegadis falcinellus Yellow-Crowned Night-Heron, Nyctanassa violacea Little Blue Heron, Egretta caerulea Tricolored Heron, Egretta tricolor Great Blue Heron, Area herodias (Green Heron, Butorides virescens) Cattle Egret, Bubulcus ibis Other Nesting Species Colonial Nesters Double-Crested Cormorant, Phalacrocorax auritus Herring Gull, Larus argentatus Great Black-Backed Gull, Larus marinus Common Tern, Sterna hirundo Single Nesters Waterfowl: Canada Goose, Mute Swan, American Black Duck, Mallard, Gadwall American Oystercatcher Willet Spotted Sandpiper Passerine sp. Methods • May 15-June 26, 2018 • Travel to islands by boat • Conduct ground surveys of nesting birds using 1-3 teams of surveyors – One person to record data – One person to observe nest content – One person to navigate through colony • When possible, we identify each nest to species, and record nest content and nesting substrate Results • Species Profiles • Island Group Trends http://www.dancingotter.ca DATA! Elders Point Elders Marsh Point Elders Marsh Huckleberry Island Huckleberry Swinburne Swinburne Island Governors Island Governors Total Islands and and Total Islands Little Egg Island Little Egg Other Mainland Mainland Other Shooter's Shooter's Island Meadows of Isle Hoffman Island Hoffman U Thant Island U Thant Subway Island Subway South Brother South Prall's Island Prall's Total Total Islands Goose Goose Island Mill Rock Mill Mainland Red Red Fern Colonies Island West East Wader Species GREG 211 87 3 0 0 2 19 122 0 0 0 0 0 0 0 0 0 444 444 CAEG 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 SNEG 75 130 0 0 0 26 29 31 0 0 0 0 0 0 0 0 0 291 291 BCNH 237 194 14 0 0 27 10 114 9 0 0 0 0 0 0 0 0 605 605 YCNH 0 1 0 0 0 0 0 0 1 0 0 0 0 0 1 65 51 3 119 LBHE 3 0 0 0 0 1 2 1 0 0 0 0 0 0 0 0 0 7 7 GLIB 55 0 0 0 0 6 0 67 0 0 0 0 0 0 0 0 0 128 128 GRHE 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TRHE 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 1 GBHE 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 Unidentified 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Total Active 581 412 17 0 0 63 60 335 10 0 0 0 0 0 1 65 52 1479 1596 Wader Nests Cormorants DCCO 865 376 69 0 0 160 99 0 0 468 0 0 0 56 0 0 0 2093 Gulls HERG Nests 103 5 2 145 0 0 0 0 0 0 0 255 HERG Adults 200 155 288 371 1014 GBBG Nests 73 8 22 51 0 0 0 7 0 0 0 161 GBBG Adults 7 12 48 251 318 Wading Bird Nesting Activity – 1982-2018 Harbor Heron Populations (1982-2018) GREG 2500 2233 CAEG 2115 2000 1982 1892 18491841 1837 1836 1846 1875 1789 1779 SNEG 1742 1725 1655 1624 1560 1519 1516 1500 1467 1479 1439 14401457 1420 BCNH 1355 1367 1268 1217 Nesting Pairs Nesting 1000 9711002 YCNH 909 764 688 LBHE 500 333 GLIB 0 1997 2005 2013 1982 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1998 1999 2000 2001 2002 2003 2004 2006 2007 2008 2009 2010 2011 2012 2014 2015 2016 2017 2018 Black-Crowned Night-Heron Harbor Heron Populations (1982-2018) GREG 1600 CAEG 1400 1343 SNEG 1200 1211 1091 1089 1092 BCNH 1049 1000 997 1017 1022 932 932 936 YCNH 855 857 854 884 802 817 800 750 781 700 LBHE 645658 600 597 605 Nesting Pairs Nesting 519 554 551 517538552 GLIB 400 366 320 277 GRHE 200 170 TRHE 0 UNID 1982 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 Black-Crowned Night-Heron Great Egret Harbor Heron Populations (1982-2018) GREG 700 600 CAEG 567 500 498 444 425410 408 SNEG 400 381 361346 345 300 308 265 280 247 Nesting Pairs Nesting 241 YCNH 216215 230 200 206 190 189 166 182 152 136 146 113 108 100 89 48 45 62 48 LBHE 0 5 22 1988 1995 2002 2009 1982 1985 1986 1987 1989 1990 1991 1992 1993 1994 1996 1997 1998 1999 2000 2001 2003 2004 2005 2006 2007 2008 2010 2011 2012 2013 2014 2015 2016 2017 2018 Great Egret Snowy Egret Harbor Heron Populations (1982-2018) CAEG 350 SNEG 313 301 302 308 300 295 290291 279 276 YCNH 264 263 271 250 246 243 240 239 236 225 212 217 217 LBHE 204 201 204 201 209 200 192200 194 177 GRHE 150 138 Nesting Pairs Nesting TRHE 100 96 80 70 50 55 UNID 0 Linear (SNEG) 1990 1997 2004 2011 1982 1985 1986 1987 1988 1989 1991 1992 1993 1994 1995 1996 1998 1999 2000 2001 2002 2003 2005 2006 2007 2008 2009 2010 2012 2013 2014 2015 2016 2017 2018 Snowy Egret Glossy Ibis Harbor Heron Populations (1982-2018) CAEG 400 YCNH 350 350348 329 LBHE 300 275 264 271 250 254 246 254 GLIB 242 235237 215 224 200 205 GRHE 180180 178 175 178 174 152 161 150 142 142 149 148 Nesting Pairs Nesting 125 128 115 TRHE 100 111 79 UNID 50 51 0 9 2 Linear (GLIB) 1986 1993 2000 2007 2014 1982 1985 1987 1988 1989 1990 1991 1992 1994 1995 1996 1997 1998 1999 2001 2002 2003 2004 2005 2006 2008 2009 2010 2011 2012 2013 2015 2016 2017 2018 Glossy Ibis Yellow-Crowned Night-Heron Redfern Houses, Far Rockaway, NY 65 YCNH nests -Matching high count of 2010 YCNHs Across the Harbor • Hammel Houses, Rockaway Beach (37n) • Lindenwood, Queens (3n) • Governors Island (1n) • Harmon Cove, NJ: (14n) • Elsewhere? Other Waders in 2018 • Little Blue Heron: 7 pairs • Tricolored Heron: 1 pair • No Cattle Egret (last pair seen in 2010) • No Green Heron on islands – Breeding on SI • No Great Blue Heron on islands – Breeding in Clove Lakes Park, S.I. Double-Crested Cormorant vs. Waders Other Colonial Waterbirds - 2018 # 2018 Increase or decrease since 2017 Pairs interim survey Species HERG* 255 increased from 156 GBBG* 161 stable, from 162 * Pairs determined by nest or adult count on islands excluding Jamaica Bay (see USDA report) Fluidity in Wader Colony Placement Over 30+ Years 30+ Placement Colony Over Wader in Fluidity Nesting Pairs 1000 1500 2000 2500 500 0 1982 1985 1986 1987 1988 1989 Nesting Island Trends, All Waders (1982 Waders All Trends, IslandNesting 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 - 2013 2018) 2014 2015 2016 2017 2018 Pralls I.of Meadows Shooters Swinburne Hoffman Mill Rock South Brother North Brother Goose Huckleberry Subway Little Egg Canarsie EldersE.