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Birds of Note All Records For Great Cormorant
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| Great Cormorant | 1992 | Oct-Dec | Lancaster | A new arrival date on the river's Conowingo Pond 9/1 (Bob Schutsky) |
| Great Cormorant | 1992 | Oct-Dec | Carbon | 3 (1 ad., 2 imm.) at Beltzville L. 12/20. a 1st Co. record (R. Wiltraut, Joel Silfies) |
| Great Cormorant | 1992 | Oct-Dec | Philadelphia | high of 10 along the Delaware R. 12/13 (Ed Fingerhood) to 12/29 (John Miller) |
| Great Cormorant | 1992 | Oct-Dec | Northampton | 4 at Martin's Creek Quarry 11/15, a 1st Co. record and a first away from the rivers (Arlene Koch et al). see report elsewhere |
| Great Cormorant | 1993 | Jan-Mar | Bucks | 1 at Tullytown 1/2 and 1 at Nockamixon SP (Steve Farbotnik) and 12 at Bristol 3/27 (Gerry Dewaghe) |
| Great Cormorant | 1993 | Jan-Mar | Delaware | 3 on the Delaware River 1/17 (Nick Pulcinella) |
| Great Cormorant | 1993 | Jan-Mar | Philadelphia | 36 on the Delaware R. 1/17 on the mid-winter census |
| Great Cormorant | 1993 | Apr-Jun | Bucks | 1 imm. at New Hope 5/25 (Bill Hoehne) |
| Great Cormorant | 1993 | Apr-Jun | Delaware | 1 at Marcus Hook 4/18 (Nick Pulcinella) |
| Great Cormorant | 1993 | Apr-Jun | Philadelphia | 2 on 5/8 on the Delaware R |
| Great Cormorant | 1993 | Jan-Mar | Philadelphia | 2 at Tinicum 12/18 |
| Great Cormorant | 1994 | Jan-Mar | Bucks | 2 on 12/17 on the So. Bucks CBC (Bob Mercer) |
| Great Cormorant | 1994 | Jan-Mar | Delaware | 4 on 12/17 on the Delaware R. (Bill Stocku) |
| Great Cormorant | 1994 | Oct-Dec | Lancaster | 1 ad. flew past the Conejohela Flats 10/16, and another observed on the Conowingo Pond 11/20 (EBNT) |
| Great Cormorant | 1994 | Apr-Jun | Philadelphia | 1 on 5/14 on Mud I. (NAMC) |
| Great Cormorant | 1994 | Jan-Mar | Bucks | 1-3 at Bristol 1/22-3/26 (G. Carmichael), with a high of 12 at Tullytown (S. Farbotnik) |
| Great Cormorant | 1995 | Jan-Mar | Delaware | 1 on 3/18 at Marcus Hook (Al Guarente) |
| Great Cormorant | 1995 | Jan-Mar | Philadelphia | 59 on 1/21 were high on the Winter Bird Count |
| Great Cormorant | 1995 | Jan-Mar | Bucks | 2 on 12/16 (SBC) |
| Great Cormorant | 1995 | Apr-Jun | Delaware | 1 on 5/1 at the Delaware R. (Bill Stocku) |
| Great Cormorant | 1995 | Apr-Jun | Bucks | 1 on 4/2 at Peace Valley (T. Wartenberger) and 3 on 5/6 (no loc., no obs.) |
| Great Cormorant | 1995 | Jan-Mar | Delaware | 4 on 12/16 on the Delaware River (Nick Pulcinella) |
| Great Cormorant | 1995 | Oct-Dec | Lancaster | 3 on 10/15-20 at Wissler Run Park (Bob Schutsky, Randy Miller) |
| Great Cormorant | 1995 | Jan-Mar | Philadelphia | Present from 11/26 with a high of 41 on 12/16 on the Delaware River (m. obs.) |
| Great Cormorant | 1996 | Jul-Sep | Berks | 1 on 7/19 at Glen Morgan Lake (Ken Lebo) |
| Great Cormorant | 1996 | Oct-Dec | Carbon | 1 on 9/1 at Beltzville SP was 2nd for this location (Dave Hawk) |
| Great Cormorant | 1996 | Jan-Mar | Philadelphia | present from 10/31 to 12/12 on the Delaware River (Ed Fingerhood) |
| Great Cormorant | 1996 | Jan-Mar | Bucks | 1 on 12/18 at Nockamixon SP (Jason Horn) and 1 on 12/21 on the So. Bucks CBC |
| Great Cormorant | 1996 | Jan-Mar | Delaware | present from 12/3 on with 4 on 12/21 at the Delaware River (Nick Pulcinella) |
| Great Cormorant | 1996 | Jan-Mar | Delaware | Present all quarter |
| Great Cormorant | 1996 | Jan-Mar | Philadelphia | Present up to 3/22 with a high of 11 on 2/26 |
| Great Cormorant | 1996 | Apr-Jun | Berks | 1 on 4/28 at Glen Morgan L. was a first county record (Randy Miller, Ken Lebo) |
| Great Cormorant | 1996 | Apr-Jun | Delaware | 2 on 4/19 at Essington (no details)(Nick Pulcinella) |
| Great Cormorant | 1996 | Apr-Jun | Philadelphia | 7 on 4/14 at Delaware River at Poquessing Creek (no details)(Ed Fingerhood) |
| Great Cormorant | 1996 | Oct-Dec | Lancaster | 1 on 10/8 on the Conowingo Pond (Bob Schutsky) |
| Great Cormorant | 1996 | Jan-Mar | Bucks | Present all quarter |
| Great Cormorant | 1997 | Jan-Mar | Philadelphia | 39 on 1/11 (Winter Bird Count) |
| Great Cormorant | 1997 | Oct-Dec | Philadelphia | Present from an early date of 10/23 when 6 were seen (Ed Fingerhood) |
| Great Cormorant | 1997 | Apr-Jun | Philadelphia | Up to 4 present up to 5/10 on the Delaware River (m. obs.) |
| Great Cormorant | 1997 | Oct-Dec | Bucks | Present from 10/14 (Peace Valley Park), mostly on the Delaware R |
| Great Cormorant | 1997 | Oct-Dec | Delaware | Present from 11/2 at Marcus Hook (Al Guarente) |
| Great Cormorant | 1997 | Apr-Jun | Montgomery | 1 on 5/3-24 at Green Lane Res. (Kevin Crilley) |
| Great Cormorant | 1997 | Oct-Dec | Montgomery | 1 on 10/22 at Green Lane Res.(George Franchois) |
| Great Cormorant | 1997 | Apr-Jun | Delaware | Present all quarter with a high of 5 on 3/18 at Marcus Hook (Jim Lockyer) |
| Great Cormorant | 1998 | Jan-Mar | Delaware | Present to 2/19 at Marcus Hook (Al Guarente) |
| Great Cormorant | 1998 | Jan-Mar | Philadelphia | Present up to 3/27 with 42 on 1/10 along the Delaware River (m. obs.) |
| Great Cormorant | 1998 | Jan-Mar | Delaware | 1 on 12/19 at Marcus Hook (Nick Pulcinella) |
| Great Cormorant | 1998 | Jan-Mar | Bucks | 3 present 12/2-19 on the Delaware River (Ken Reiker) |
| Great Cormorant | 1998 | Apr-Jun | Bucks | Present up to 5/16 at the Delaware River |
| Great Cormorant | 1999 | Apr-Jun | Northampton | Up to 5 in April and one remaining to 5/28 at Martins Creek (Rick Wiltraut) |
| Great Cormorant | 1999 | Jan-Mar | Delaware | Present all quarter (Jan-Mar) |
| Great Cormorant | 1999 | Apr-Jun | Delaware | Present up to 4/12 in Essington (Nick Pulcinella) |
| Great Cormorant | 1999 | Jan-Mar | Bucks | Present from 12/18 through the quarter on the Delaware River |
| Great Cormorant | 1999 | Jan-Mar | Delaware | Present from 12/2 at Marcus Hook (Nick Pulcinella) |
| Great Cormorant | 1999 | Jan-Mar | Philadelphia | 17 on 12/18 on the Delaware River (J. Billings) |
| Great Cormorant | 2000 | Apr-Jun | Delaware | 1 on 4/22 at Marcus Hook (Al Guarente) |
| Great Cormorant | 2000 | Apr-Jun | Northampton | 1 on 5/30 at Martins Creek (Rick Wiltraut) |
| Great Cormorant | 2000 | Oct-Dec | Bucks | Present from 10/20-12/16 at the Delaware River (m. obs.) |
| Great Cormorant | 2000 | Jan-Mar | Delaware | 1 on 12/16 at Marcus Hook (Nick Pulcinella) |
| Great Cormorant | 2000 | Oct-Dec | Montgomery | 1 on 11/28 at Green Lane Reservoir (Kevin Crilley) |
| Great Cormorant | 2000 | Jan-Mar | Northampton | 1 on 12/2 at Green Pond (Jeff Hopkins) |
| Great Cormorant | 2000 | Jan-Mar | Philadelphia | Present all quarter with a high of 40 on 1/8 on the Delaware River (m. obs.) |
| Great Cormorant | 2000 | Jan-Mar | Bucks | Present from 1/22-2/28 at Bensalem and on the Delaware River (m. obs.) |
| Great Cormorant | 2001 | Apr-Jun | Delaware | present on the Delaware River |
| Great Cormorant | 2001 | Jan-Mar | Philadelphia | present part of the quarter (Jan-Mar) |
| Great Cormorant | 2001 | Oct-Dec | Berks | 1 immature 11/10-24 at Glen Morgan Lake (Ken Lebo) |
| Great Cormorant | 2001 | Jan-Mar | Bucks | 1 at Peace Valley Park 11/8-17 (August Mirabella); 1 on 11/18 at Upper Black Eddy (Devich Farbotnik); 13 on 12/15 on the lower Delaware River (S-CBC); 1 at Nockamixon State Park 12/19-26 (Bill Etter, Cameron Rutt) |
| Great Cormorant | 2001 | Oct-Dec | Carbon | 1 on 11/11 at Beltzville Lake and 1 on 11/17+ at Wild Creek Reservoir (var ob) (no desc) |
| Great Cormorant | 2001 | Jan-Mar | Chester | 1-3 on & off from 10/3 to 12/1 (John McManara, m obs) |
| Great Cormorant | 2001 | Oct-Dec | Lancaster | 1 at the Conejohela Flats on 10/6 and 10/14 (Bob Schutsky) (no desc) |
| Great Cormorant | 2001 | Oct-Dec | Montgomery | 1 immature 11/4 to end of quarter at Green Lane Res. (George Franchois, Kevin Crilley, var ob) |
| Great Cormorant | 2002 | Aug-Nov | Lancaster | 1 on 10/12 and 10/17 at Susquehanna River Conejohela Flats (Bob Schutsky) |
| Great Cormorant | 2002 | Aug-Nov | Northampton | 2 from 11/17-22 in a quarry off Route 611 (Michael Schall) |
| Great Cormorant | 2002 | Apr-Jun | Bucks | 2 up to 5/6 near Bristol |
| Great Cormorant | 2002 | Apr-Jun | Northampton | 1 present 4/2 (no details) |
| Great Cormorant | 2002 | Aug-Nov | Bucks | 1 on 10/4 on the Delaware River at Bristol (Jason Horn) |
| Great Cormorant | 2002-2003 | Dec-Feb | Bucks | present on the on the southern Del. R. as usual all winter (Devich Farbotnik, Matt Sharp). |
| Great Cormorant | 2003 | Mar-May | McKean | an immature 4/8-4/10 at Redbridge on Kinzua Lake (John Fedak) |
| Great Cormorant | 2003 | Mar-May | Northampton | 3 wintered along the Delaware River between Sandt's Eddy and the Martins Creek Power Plant (v. obs.); 1 flying past the Martins Creek Flyash Basin 5/25 (v. obs.) |
| Great Cormorant | 2003 | Mar-May | Philadelphia | 51 on the Delaware River 3/16 (Matt Sharp) |
| Great Cormorant | 2004 | Mar-May | Northampton | a max. of 3 on 3/9 at the Martin's Creek Quarry (Mike Schall) |
| Great Cormorant | 2004 | Aug-Nov | Bucks | One at Nockamixon SP 11/29 was away from the lower Delaware R. where expected (Bill Etter) |
| Great Cormorant | 2004 | Aug-Nov | Northampton | An early one was at the Martins Creek Quarry 11/21 (Michael Schall) |
| Great Cormorant | 2004-2005 | Dec-Feb | Bucks | all season on the Del. R at Bristol with a peak of 20+ on 12/19 (August Mirabella); three at Nockamixon SP 12/25 (Bill Etter) adds to other recent sightings there so that they are now expected annually |
| Great Cormorant | 2005 | Aug-Nov | Bucks | a very early one was at Giving Pond 8/28, moving up the fall first arrival date by several weeks (Diane Allison); also away from its normal lower Delaware River haunts; one was at Nockamixon SP11/24 (Bill Etter); and the highest count reported was 15 at Bristol 11/26 (Cameron Rutt, August Mirabella) |
| Great Cormorant | 2005 | Mar-May | Northampton | an immature at the Nazareth Quarry 4/3; and a high of five at The Martins Creek Quarry 4/12 (Michael Schall) |
| Great Cormorant | 2005 | Aug-Nov | Delaware | regular. were first reported on the Delaware River 11/2 (Doris McGovern) |
| Great Cormorant | 2005 | Mar-May | Bucks | two at the Tullytown area 5/14 (Al & Nancy Bilheimer) |
| Great Cormorant | 2005-2006 | Dec-Feb | Berks | an imm. at Trout Run Res. above Boyertown 12/17-12/18 (Patrick O'Donnell) |
| Great Cormorant | 2005-2006 | Dec-Feb | Bucks | only three were tallied on the Southern Bucks Co. CBC 12/17 |
| Great Cormorant | 2005-2006 | Dec-Feb | Delaware | one on the Delaware River at Marc7u Hook 12/17 (Nick Pulcinella) |
| Great Cormorant | 2005-2006 | Dec-Feb | Northampton | three were at Martins Creek Quarry 2/2-2/5 (Billy Weber). No desc |
| Great Cormorant | 2005-2006 | Dec-Feb | Philadelphia | all season with 26 counted on the Philadelphia Mid-Winter Census |
| Great Cormorant | 2006 | Mar-May | Bucks | at least 2 at Bristol 5/20 (Devich Farbotnik) |
| Great Cormorant | 2006 | Mar-May | Philadelphia | present during the season along the Delaware R.. |
| Great Cormorant | 2006 | Mar-May | Delaware | one along Darby Creek 4/10 (Al Guarente) |
| Great Cormorant | 2006 | Mar-May | Northampton | one at Martins Creek quarry 3/9 (observer not specified) |
| Great Cormorant | 2006-2007 | Dec-Feb | Philadelphia | Wintered as usual on Delaware R. (Doris McGovern). |
| Great Cormorant | 2006-2007 | Dec-Feb | Montgomery | Nine at Martins Creek 12/31 |
| Great Cormorant | 2006-2007 | Dec-Feb | Bucks | A record high 20 recorded on the Southern Bucks CBC 12/16 twenty were counted at Mudd Island 2/12 (Bill Keim) |
| Great Cormorant | 2006-2007 | Dec-Feb | Delaware | Three were counted for the Delaware County CBC 12/16 (Nick Pulcinella) |
| Great Cormorant | 2007 | Mar-May | Northampton | last reported at Martins Creek Quarry 4/3 |
| Great Cormorant | 2007 | Mar-May | Philadelphia | present up to 3/23 (Al Guarente). |
| Great Cormorant | 2007 | Mar-May | Bucks | high of 7 at Bristol 5/16 was unusually high for this late date (Devich Farbotnik) |
| Great Cormorant | 2007 | Mar-May | Chester | one at Struble Lake 4/26 (Robert Cook) second county record |
| Great Cormorant | 2007 | Mar-May | Delaware | one lingered on the Delaware R. until at least 3/23 (Al Guarente) |
| Great Cormorant | 2008 | Jun-Jul | Bucks | An adult provided an assumed new spring late date 6/1 at Rohm and Haas at Bristol (Devich Farbotnik) and an adult discovered at Morrisville on 7/14 (Bill Keim) may indicate it never left, apparently first Jun and Jul reports for Bucks. |
| Great Cormorant | 2008-2009 | Dec-Feb | Northampton | three at Martins Creek Quarry 12/13 (Michael Schall) |
| Great Cormorant | 2008-2009 | Dec-Feb | Philadelphia | Twenty-three on the mid-winter census 1/10. |
| Great Cormorant | 2008-2009 | Dec-Feb | Bucks | Southern Bucks CBC new high count of 32 on 12/20 |
| Great Cormorant | 2009 | Aug-Nov | Lancaster | one on the Susquehanna R. at Peach Bottom 11/3 (Chuck Chalfant). |
| Great Cormorant | 2009 | Mar-May | Northampton | one at Martin's Creek Quarry 3/21 (Michael Schall). |
| Great Cormorant | 2009 | Mar-May | Bucks | 5 at Bristol 5/16 (Devich Farbotnik) |
| Great Cormorant | 2009 | Mar-May | Delaware | one on the Delaware River 3/28 (Al Guarente) |
| Great Cormorant | 2009 | Aug-Nov | Berks | one at Lake Ontelaunee 9/14 (Ken Lebo, Matt Wlasniewski) was the fourth county record |
| Great Cormorant | 2009 | Aug-Nov | Bucks | one at Mud Island on the unusual date of 8/7 (Devich Farbotnik) |
| Great Cormorant | 2009-2010 | Dec-Feb | Bucks | High count at Bristol was 13 on 12/29 (Tom Johnson, Cameron Rutt), singles away from Bristol were at Uhlerstown 12/4 (Erich Boenzli) and New Hope 2/10-18 (Bill Hoehne) |
| Great Cormorant | 2009-2010 | Dec-Feb | Philadelphia | Two on Pennypack Valley CBC 12/19, a total of 75 was counted 1/1 (Frank Windfelder). |
| Great Cormorant | 2010 | Mar-May | Bucks | 28 at Bristol and 8 at Mud Island 3/14 (Devich Farbotnik), one at Giving Pond, Uhlerstown 3/26 (Erich Boenzli) and 4 lingered at Bristol 5/15 (Devich Farbotnik) |
| Great Cormorant | 2010 | Mar-May | Northampton | one at Martin's Creek Quarry 3/7 (Michael Schall) |
| Great Cormorant | 2010 | Mar-May | Philadelphia | last reported 3/26 (Frank Windfelder). |
| Great Cormorant | 2010 | Mar-May | Delaware | 4 on the Delaware River 3/21 (Al Guarente) |
| Great Cormorant | 2010 | Aug-Nov | Bucks | returned 11/16 |
| Great Cormorant | 2010 | Aug-Nov | Lehigh | one imm. at Lehigh Canal Park 9/18-10/9 (Mark Boyd) |
| Great Cormorant | 2010 | Aug-Nov | Philadelphia | returned 10/19. |
| Great Cormorant | 2010-2011 | Dec-Feb | Bucks | high count of 16 at Mud Island-Bensalem Township 2/13 (Devich Farbotnik) |
| Great Cormorant | 2010-2011 | Dec-Feb | Northampton | one on the Delaware R. 1/17 (Bill Etter) |
| Great Cormorant | 2010-2011 | Dec-Feb | Philadelphia | high count of 32 on mid-winter census 1/8. |
| Great Cormorant | 2011 | Mar-May | Bucks | continued from last season, with a high count 3/13 at Bristol (15) and Mud Island (4), and one remained at the Penn-Warner Tract 5/15 (Devich Farbotnik) |
| Great Cormorant | 2011 | Mar-May | Philadelphia | present from last season up to 4/13. |
| Great Cormorant | 2011 | Aug-Nov | Bucks | one at Giving Pond 11/12 (Paul Cooper). |
| Great Cormorant | 2011-2012 | Dec-Feb | Philadelphia | 6 on mid-winter census 1/7. |
| Great Cormorant | 2011-2012 | Dec-Feb | Bucks | a combined total of 62 on 1/27, including 42 at Bristol and 20 near Mud Island, is believed to be a high one-day count for Bucks (Devich Farbotnik) |
| Great Cormorant | 2012 | Aug-Nov | Bucks | first reported at Bristol 10/13 (Devich Farbotnik) |
| Great Cormorant | 2012 | Aug-Nov | Delaware | one at the Commodore Barry Bridge 10/31 (Al Guarente, Nick Pulcinella) |
| Great Cormorant | 2012 | Aug-Nov | Lancaster | one at Peach Bottom 11/4 (Bob Schutzky) |
| Great Cormorant | 2012 | Aug-Nov | Montgomery | one imm. at Green Lane Reservoir 11/19-20 (August Mirabella, et al.) |
| Great Cormorant | 2012 | Aug-Nov | Philadelphia | on the Delaware River beginning 10/11 (m.ob.). |
| Great Cormorant | 2012 | Mar-May | Bucks | one at Peace Valley Park 4/17-21 (August Mirabella), 8 on the Delaware River at Bristol 3/17 (Mark Gallagher) |
| Great Cormorant | 2012 | Mar-May | Delaware | one on the Delaware River 4/17 (Al Guarente) |
| Great Cormorant | 2012 | Mar-May | Northampton | one at Martin's Creek Quarry 3/16 (Michael Schall, Corinne Campbell Schall). |
| Great Cormorant | 2012-2013 | Dec-Feb | Bucks | present all season with a high count of 25 at Bristol 1/1 (Devich Farbotnik, m.ob.) |
| Great Cormorant | 2012-2013 | Dec-Feb | Delaware | 4 at Marcus Hook 12/15 (Nick Pulcinella) |
| Great Cormorant | 2012-2013 | Dec-Feb | Philadelphia | present all season with a high count of 11 on 12/15 (m.ob). |
| Great Cormorant | 2013 | Mar-May | Bucks | high single-day counts of 30 at Mud Island 3/2 and 12 at Bristol 3/2 (Devich Farbotnik), one at Rohm and Haas, Bristol 5/23 (Devich Farbotnik) |
| Great Cormorant | 2013 | Aug-Nov | Bucks | beginning 10/19 at Churchville (Butch Lishman) |
| Great Cormorant | 2013 | Aug-Nov | Philadelphia | beginning 10/7 on the Delaware River (m.ob.). |
| Great Cormorant | 2013 | Mar-May | Philadelphia | last reported from the winter season 4/22 (Frank Windfelder). |
| Great Cormorant | 2013 | Mar-May | Berks | one at Lake Ontelaunee 4/5 (Rudy Keller) |
| Great Cormorant | 2013-2014 | Dec-Feb | Bucks | high count was 35 on Southern Bucks CBC 12/14 |
| Great Cormorant | 2013-2014 | Dec-Feb | Delaware | present on the Delaware River 12/8-1/18 (m.ob.), with a high count of 2 on 12/14 (Al Guarente) |
| Great Cormorant | 2013-2014 | Dec-Feb | Philadelphia | present all season, with high count of 3 on a mid-winter census 1/12. |
| Great Cormorant | 2014 | Aug-Nov | Lancaster | one on the Susquehanna River 10/29 (Tom Raub) |
| Great Cormorant | 2014 | Aug-Nov | Northampton | one at Minsi Lake 11/1 (Michael Schall, Corrine Campbell Schall). |
| Great Cormorant | 2014 | Mar-May | Philadelphia | last seen from the winter season 4/13 (George Armistead). |
| Great Cormorant | 2014 | Mar-May | Bucks | high count of 35 at Bristol 3/15 (Paul Cooper), last were 6 at Mud Island 4/4 (Devich Farbotnik) |
| Great Cormorant | 2014 | Mar-May | Delaware | 5 at the Delaware River 3/28 (Al Guarante) |
| Great Cormorant | 2014 | Mar-May | Northampton | one at the Portland Pedestrian Bridge 3/11-14 (Matt Sabatine, et al.) |
| Great Cormorant | 2014 | Aug-Nov | Bucks | first report for the season was 11/11-13 at Giving Pond near Uhlerstown (Paul Cooper, Erich Boenzli) |
| Great Cormorant | 2014 | Aug-Nov | Delaware | one at John Heinz NWR 10/5 (Tom Bush) and one on the Delaware River 11/7 (Al Guarente) |
| Great Cormorant | 2014-2015 | Dec-Feb | Bucks | high count was 24 during the Southern Bucks CBC 12/20 |
| Great Cormorant | 2014-2015 | Dec-Feb | Delaware | 3 at Marcus Hook 12/20 (Nick Pulcinella) and one at PPL Park (Al Guarente) |
| Great Cormorant | 2014-2015 | Dec-Feb | Philadelphia | present all season with high count of 49 on the Philadelphia mid-winter census 1/10 (m.ob.). |
| Great Cormorant | 2015-2016 | Dec-Feb | Bucks | high count on the Delaware R. was 15 at Bristol 1/1 (Devich Farbotnik), with 9 counted on the Southern Bucks CBC 12/19 |
| Great Cormorant | 2015-2016 | Dec-Feb | Delaware | 2 at Governor Printz Park 1/15 (Damon Orsetti) |
| Great Cormorant | 2015-2016 | Dec-Feb | Philadelphia | present all season, with 7 on the Pennypack Valley CBC 12/19. |
| Great Cormorant | 2016 | Mar-May | Bucks | on the Delaware River up to 3/19 (Mark Gallagher), one late bird on the river at Bristol 5/1 (Devich Farbotnik) |
| Great Cormorant | 2016 | Mar-May | Delaware | one flying past Philadelphia International Airport 4/7 (Al Guarente), one under the Commodore Barry Bridge 4/11 (Al Guarente) |
| Great Cormorant | 2016 | Mar-May | Philadelphia | last of the season on the Delaware River 4/17 (Denis Mora). |
| Great Cormorant | 2016 | Aug-Nov | Montgomery | one at Green Lane Park 11/1023 (Kenneth Rieker). |
| Great Cormorant | 2016 | Aug-Nov | Bucks | one at the Penn-Warner Tract 10/28 (Devich Farbotnik) |
| Great Cormorant | 2016-2017 | Dec-Feb | Philadelphia | High count of 13 at Navy Yard 12/26 (Adrian Binns, Debbie Beer). |
| Great Cormorant | 2016-2017 | Dec-Feb | Bucks | High count of 16 at Bristol, on Delaware R. 12/11 (Devich Farbotnik), also at Nockamixon SP 12/3-7 (Devich Farbotnik, August Mirabella, Paul Cooper) |
| Great Cormorant | 2016-2017 | Dec-Feb | Delaware | Two at Commodore Barry Bridge 12/17 (Al Guarente, Nick Pulcinella) and one at Marcus Hook (Al Guarente) |
| Great Cormorant | 2017 | Aug-Nov | Bucks | 3 at Bristol 11/12 (Thomas Ford-Hutchinson) |
| Great Cormorant | 2017 | Aug-Nov | Philadelphia | returned to locations on the Delaware River by 10/28 (m.ob.). |
| Great Cormorant | 2017 | Mar-May | Bucks | seasonal high count of 9 at Bristol 3/9(Dawn Denner), one lingered at Mud Island to 5/29 (DevichFarbotnik) |
| Great Cormorant | 2017 | Mar-May | Delaware | singles at the Commodore Barry Bridge andriverfront 3/17 and 3/29 (Al Guarente). |
| Great Cormorant | 2017-2018 | Dec-Feb | Bucks | found in Bucks , where annual |
| Great Cormorant | 2017-2018 | Dec-Feb | Philadelphia | where annual |
| Great Cormorant | 2017-2018 | Dec-Feb | Lancaster | unusual were 2 flyovers along the Susquehanna R. 1/7 (Josh Houck, Meredith Lombard, Mike Epler, Nicole Koeltzow, Zach Millen). |
| Great Cormorant | 2018 | Aug-Nov | Bucks | one at Peace Valley Park 11/3-7 (m.ob.) |
| Great Cormorant | 2018 | Mar-May | Delaware | singles at Commodore Barry Bridge/Waterfront 3/1 (Rob Fergus, Al Guarente) and 4/6 (Rob Fergus). |
| Great Cormorant | 2018 | Mar-May | Bucks | 6 at Bristol 3/11 (Dawn Denner), 6 at Quaker-Penn Park 3/25 (Steve Schmit), and last reported at Mud Island 5/5 (Devich Farbotnik) |
| Great Cormorant | 2018 | Aug-Nov | Philadelphia | present on Delaware River beginning 10/7 (m.ob.). |
| Great Cormorant | 2019 | Mar-May | Bucks | present at 4 locations on Delaware River with a high of 5 on Mud Island 3/24 (August Mirabella). |
| Great Cormorant | 2019 | Aug-Nov | Philadelphia | present on Delaware River beginning in early Oct (m.ob.). |
| Great Cormorant | 2019 | Aug-Nov | Centre | one at Colyer Lake 10/18-26 (Debra Rittelmann, et al.) |
| Great Cormorant | 2019 | Aug-Nov | Erie | one passed Sunset Point 10/11 (Jennifer Ferrick, Jerry McWilliams, Justin Berkheimer) |
| Great Cormorant | 2020 | Aug-Nov | Philadelphia | several reports beginning with one at Pennypack on the Delaware 10/4 (George Armistead, Liam Hart). |
| Great Cormorant | 2020 | Mar-May | Bucks | present during season at four locations with a high of six at Mud Island 3/8 (August Mirabella) |
| Great Cormorant | 2020 | Mar-May | Delaware | present at Fort Mifflin 3/26 (Sam Neat), 3/30 (David Eberly, Al Guarente), and 4/4 (Debbie Beer, Adrian Binns), one at Governor Printz Park 4/1 (Damon Orsetti), and one at Hildacy Farm Preserve 5/6 (Debbie Beer) |
| Great Cormorant | 2020 | Mar-May | Lancaster | one at Peach Bottom 4/22 (Bob Schutsky). |
| Great Cormorant | 2021 | Mar-May | Bucks | most reports were from Penn-Warner Tract, a high of 5 flew north 3/21 (Andrew Harrington) |
| Great Cormorant | 2021 | Mar-May | Delaware | 2 at Hog Island Rd. 3/3 (Sara Busch) |
| Great Cormorant | 2021 | Mar-May | Philadelphia | present at Philadelphia Naval Yard 3/7-30 with a high of 10 on 3/26 (Debbie Beer, Adrian Binns, Liam Hart, Holger Pflicke, Mark Greenberry), present at Philadelphia Army Corps of Engineers Compound 3/21-4/25 with a high of 3 on 3/21 (Holger Pflicke, m.ob. |
| Great Cormorant | 2021 | Aug-Nov | Berks | one at Lake Ontelaunee 10/26 (Matt Wlasniewski) |
| Great Cormorant | 2021 | Aug-Nov | Bucks | one at Bristol 11/23 (Eric Zawatski) and 2 at Neshaminy S.P. 11/28 (Scott Godshall). |
| Great Cormorant | 2022 | Mar-May | Bucks | 3 at Penn-Warner Tract 3/1 (Richard Smith) and 3/13 (Dawn Denner), one at Churchville Park 3/15 (Sharon Marcinik), and one at Morrisville 4/16 (Richard Smith) |
| Great Cormorant | 2022 | Mar-May | Delaware | reported 3/19-20 (m.ob.) and 4/9 (Jim McConnell) at Delaware River/Hog Island Road. |
| Great Cormorant | 2022 | Aug-Nov | Philadelphia | one or 2 along Delaware R. beginning 10/14 (m.ob.) were the only ones reported in the state prior to Dec. |
| Great Cormorant | 2023 | Mar-May | Bucks | reported in March at the usual locations along the Delaware River (m.ob.) with a max of five in Bensalem Twp. 3/4 (Mike Grubb) |
| Great Cormorant | 2023 | Mar-May | Delaware | reported at the Commodore Barry Bridge 3/26 (Oliver James, Christopher Hinkle), one flying over Tinicum Twp. 4/9 (Ethan Kang) |
| Great Cormorant | 2023 | Mar-May | Philadelphia | up to two at Bartram's Garden 3/12-18 (Karl Wallulis, Lindsay Collins, Yen Nguyen), one at the Philadelphia Army Corps of Engineers Compound 3/26 (m.ob.), present at the Philadelphia Naval Yard 3/2-4/5 with a high of 12 from 3/20-22 (m.ob.). |
| Great Cormorant | 2023 | Aug-Nov | Bucks | arrived at Bensalem Twp 10/4 (Kimberly Bou) |
| Great Cormorant | 2023 | Aug-Nov | Delaware | present on the Delaware River from 10/13 (m.ob.). |
| Great Cormorant | 2023 | Aug-Nov | Phladelphia | present on the Delaware River from 10/13 (m.ob.). |