delawarensis Ring-billed Gull(last update:
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Coordinators: 1cy June 2cy Jan 3cy Jan adult Jan |
adult: MarchRing-billed Gulls vs Common Gulls: comparison from a Dutch perspective - 201402 by: Maartren van Kleinwee (GULLS TO THE HORIZON)- March 06 2014. Ring-billed Gulls Larus delawarensis are common visitors to Europe with frequent sightings in countries directly bordering the North Atlantic such as Ireland, Spain and Portugal. Note #1: This article is nothing more than a personal exercise in comparing 2 random groups from both sides of the Atlantic; it should by no means be seen as a definitive comparison between these 2 species; this requires a far higher number of individuals. AdultsAlthough it should be quite straight forward to distinguish an adult Ring-billed Gull from a Common Gull, lets compare some of the main features. Compared to an adult Common Gull, an adult Ring-billed Gull is different in the following aspects:
Bill and eye color comparisonNote that the bill pattern on the Ring-billed Gulls is very distinct, while the ‘ring’ on the bill of a Common Gull is very faint. Primary patternQ. How does the pattern on the primaries help us recognize an Ring-billed Gull in the Netherlands? Tertial crescentProbably one of the key features of spotting an adult Ring-billed Gull in a group of Common Gulls (especially from afar) is its much reduced white tertial crescent. Vocalization (see/listen also HERE)The vocalization of Ring-billed is lower in tone, more nasal than Common and reminiscent of Herring Gull.
CommentsAlthough this has been a fully unscientific and random comparison, it has nevertheless been a very interesting and useful exercise for me. LocationsThe majority of the Ring-billed Gull photos in this article were taken at the beach at the BP refinery at Whiting, Indiana, USA, adjacent to Lake Michigan. |
Ring-billed Gull delawarensis A36 adult, March 19 2014, Wethersfield, CT. Picture: Keith Mueller. |
Ring-billed Gull delawarensis CH1 adult, March 05 2014, CT landfill. Picture: Keith Mueller. | ||
Ring-billed Gull delawarensis JZ2 6CY, March 20 2014, Stratford, CT. Picture: Donna Rae Henault Caporaso. | ||
Ring-billed Gull delawarensis K0X adult, March 19 2014, Wethersfield, CT. Picture: Keith Mueller. | ||
Ring-billed Gull delawarensis KUF 7CY, March 17 2014, Hammonaset beach, Madison, CT. Picture: Keith Mueller. | ||
Ring-billed Gull delawarensis L1C adult, March 17 2017, Edgewater Park, Cleveland, Ohio. Picture: Chuck Slusarczyk. | ||
Ring-billed Gull delawarensis LKF adult, March 19 2014, South Meriden, CT. Picture: Keith Mueller. | ||
Ring-billed Gull delawarensis X9U adult, March 05 2014, CT landfill. Picture: Keith Mueller. | ||
Ring-billed Gull delawarensis 440 adult, March 01 2010, Print Works Pond, Cranston, RI. Picture: Scott Grant. | ||
Ring-billed Gull delawarensis 643 adult, February - March 2012, Southbury, CT | ||
Ring-billed Gull delawarensis 672 adult, March 05 2014, Shepaug Dam, Southbury, CT. Picture: Keith Mueller. | ||
Ring-billed Gull delawarensis A1081 adult, March & December 2014, Stratford, CT. Picture: Donna Caporaso & Keith Mueller. | ||
Ring-billed Gull delawarensis A21 adult, March 25 2015, Wooster Pond, Stratford, CT. Picture: Frank Mantlik. | ||
Ring-billed Gull delawarensis A74 adult and A75 2nd cycle (3CY), March 08 2014, UMASS Boat Ramp, Lowell, MA. Picture: Anthony L. | ||
Ring-billed Gull delawarensis ?07 adult, March 16 2014, Stratford Boat Ramp - Stratford, CT. Picture: Donna Caporaso. | ||
Ring-billed Gull delawarensis HXP 6CY, March 19 2014, Stratford boat ramp, CT. Picture: Donna Rae Henault Caporaso. | ||
Ring-billed Gull delawarensis TC11 adult, March 24 2014, Toronto, ON. Picture: Amanda Guercio. | ||
Ring-billed Gull delawarensis TC22 adult, March 24 2014, Toronto, ON. Picture: Amanda Guercio. | ||
Ring-billed Gull delawarensis Fed band adult, March 19 2014, Wethersfield, CT. Picture: Keith Mueller. | ||
Ring-billed Gull delawarensis adult, March 2007, Cobourg, Ontario, Canada. Picture: Wikipedia. | ||
Ring-billed Gull delawarensis adult, March 04 2012, Chicago, IL. Picture: Amar Ayyash. | ||
Ring-billed Gull delawarensis adult, March 25 2012. Chicago, IL. Picture: Amar Ayyash. | ||
Ring-billed Gull delawarensis adult, March 01 2013, Canaveral National Seashore, FL. Picture: Tammy Karr. | ||
Ring-billed Gull delawarensis adult, March 17 2013, Rio Grande, NJ. Picture: Don Freiday. | ||
Ring-billed Gull delawarensis adult, March 01 2013, Canaveral National Seashore, FL. Picture: Tammy Karr. | ||
Ring-billed Gull delawarensis adult, March 01 2013, Canaveral National Seashore, FL. Picture: Tammy Karr. | ||
Ring-billed Gull delawarensis adult, March 10 2009, Gijón, Asturias, Spain. Picture: Luis Mario Arce. | ||
Ring-billed Gull delawarensis adult, March 01 2013, Canaveral National Seashore, FL. Picture: Tammy Karr. | ||
Ring-billed Gull delawarensis adult, March 25 2012. Chicago, IL. Picture: Amar Ayyash. | ||
Ring-billed Gull delawarensis adult, March 11 2012. Tinley Park, IL. Picture: Amar Ayyash. | ||
Ring-billed Gull delawarensis adult, March 27 2012. Oak Forest, IL. Picture: Amar Ayyash. | ||
Ring-billed Gull delawarensis adult, March 09 2014, Chicago, IL. Picture: Amar Ayyash. | ||
Ring-billed Gull delawarensis adult, March 04 2010, Virginia Lake, Reno, Washoe Co, Nevada. Picture: Fugle. | ||
Ring-billed Gull delawarensis adult, March 18 2012, Virginia Lake, Reno, Washoe Co, Nevada. Picture: Fugle. | ||
Ring-billed Gull delawarensis adult, March 20 2014, Wethersfield, CT. Picture: Keith Mueller. | ||
Ring-billed Gull delawarensis adult, March 25 2006, Dana Point, Orange Co., CA. Picture: John Avise. | ||
Ring-billed Gull delawarensis adult, March 28 2010, Bray, Wicklow Co., Ireland. Picture: Brendan Marnell. | ||
Ring-billed Gull delawarensis adult, March 09 2014, Chicago, IL. Picture: Amar Ayyash. | ||
Ring-billed Gull delawarensis adult, March 03 2014, Appalachian Counties, Ohio. Picture: Roger Hickey. | ||
Ring-billed Gull delawarensis adult, March 11 2011, Constitution Gardens - Washington, DC. Picture: Mr TinDC. | ||
Ring-billed Gull delawarensis adult, March 17 2013, Mendon, Utah. Picture: Ryan O'Donnell. | ||
Ring-billed Gull delawarensis adult, March 17 2013, Mendon, Utah. Picture: Ryan O'Donnell. | ||
Ring-billed Gull delawarensis adult, March 09 2014, Chicago, IL. Picture: Amar Ayyash. | ||
Ring-billed Gull delawarensis adult, March 09 2014, Chicago, IL. Picture: Amar Ayyash. |