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The undersurface of the primaries is a useful feature for separating the Forster's Tern from Arctic and Roseate terns. The Forster's Tern has a broad, blurry trailing edge to the primaries where it is thin and crisp in the Arctic and very restricted in the Roseate.
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www.mbr-pwrc.usgs.gov/id/framlst/i0690id.html
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Learn how to identify Forster's Tern, its life history, cool facts, sounds and calls, and watch videos. One of several medium-sized terns that are similar in appearance, the Forster's Tern breeds primarily in marshes and winters along the coasts. ... All About Birds > Bird Guide > Forster's Tern...
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www.allaboutbirds.org/guide/Forsters_Tern/lifehistory
www.allaboutbirds.org/guide/Forsters_Tern/lifehistory
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Learn how to identify Forster's Tern, its life history, cool facts, sounds and calls, and watch videos. One of several medium-sized terns that are similar in appearance, the Forster's Tern breeds primarily in marshes and winters along the coasts. ... All About Birds > Bird Guide > Forster's Tern...
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www.allaboutbirds.org/guide/Forsters_Tern/id
www.allaboutbirds.org/guide/Forsters_Tern/id
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Forster's Tern - Wikipedia, the free encyclopedia
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The Forster's Tern , Sterna forsteri , is a member of the tern family Sternidae. It breeds inland in North America and winters south to the Caribbean and northern South America. This species is ra...
en.wikipedia.org/wiki/Forster's_Tern
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Forster's Tern: Medium tern, pale gray upperparts, black cap, white underparts. Bill is orange, black tip. Wings are pale gray with paler primaries. Tail is pale gray, deeply forked with dark inner edge, white outer edge. ... the Forster's Tern has a current evaluation of Least Concern. The range of this bird species is...
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identify.whatbird.com/obj/470/overview/Forsters_Tern.as...
identify.whatbird.com/obj/470/overview/Forsters_Tern.aspx
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Forster's Tern; Sterna forsteri; ... One of the few exclusively North American terns, Forster's is so similar to the Common Tern that it was not recognized as a distinct species until 1831. Its preference for marshes enables it to avoid competition with the Common Tern, which favors sandy or pebbly beaches and rocky islands.
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www.enature.com/flashcard/show_flash_card.asp?recordNum...
www.enature.com/flashcard/show_flash_card.asp?recordNumber=BD0082
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Size: L: 35 cm Wt: 150 g. Males and females are similar. Seasonally dimorphic. ... Summer Adult: mantle and wings grey, with gray wing-tips; head white, with black forehead, crown, and nape; underparts white; tail forked, grey, with white outer edges; bill red, with black tip; legs red ... Juvenile: mantle and wings grey,
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www.aquatic.uoguelph.ca/birds/speciesacc/accounts/gulls...
www.aquatic.uoguelph.ca/birds/speciesacc/accounts/gulls/forsteri/account.htm
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This medium-sized tern is most easily identified by the silvery color on the upper wing primaries, as compared to the dull gray primaries of the Common Tern. The bill has an orange base and black tip during the breeding season.
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www.audubon.org/chapter/nc/nc/wb_10.html
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