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<div style="{{Pheader}} margin-bottom: -5px;">Welcome to the '''BirdForum Opus'''</div> | <div style="{{Pheader}} margin-bottom: -5px;">Welcome to the '''BirdForum Opus'''</div> | ||
<div style="{{psubheader}} text-transform: uppercase;">The ''interactive'' birding encyclopaedia</div> | <div style="{{psubheader}} text-transform: uppercase;">The ''interactive'' birding encyclopaedia</div> | ||
| − | Welcome to the '''Opus''', an interactive, multimedia encyclopaedia that [[Editors Portal|anyone can edit]]. You can use the Opus to find out about everything to do with birds - from [[Birds Portal|the birds themselves]] to [[Locations Portal|the places you can find them]]. | + | Welcome to the '''Opus''', an interactive, multimedia encyclopaedia that [[Editors Portal|anyone can edit]]. You can use the Opus to find out about [[Resources Portal|everything to do with birds]] - from [[Birds Portal|the birds themselves]] to [[Locations Portal|the places you can find them]]. |
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<div style="{{psubheader}}">Getting Started</div> | <div style="{{psubheader}}">Getting Started</div> | ||
If you're looking for a particular bird, place, or anything else related to the birding world, try searching for it using the search box at the top, or to the left, of this page. You can also get an overview of all the birds, bird song, locations or other wildlife by using the tabs above. | If you're looking for a particular bird, place, or anything else related to the birding world, try searching for it using the search box at the top, or to the left, of this page. You can also get an overview of all the birds, bird song, locations or other wildlife by using the tabs above. | ||
Latest revision as of 19:45, 16 November 2021
| Looking for something? Search for it here. |
Welcome to the Opus, an interactive, multimedia encyclopaedia that anyone can edit. You can use the Opus to find out about everything to do with birds - from the birds themselves to the places you can find them.
Includes Cabot's Tern and Cayenne Tern
Identification
Summer Adult: forehead, crown and nape black. Loose long feathers at the nape form a crest in the wind or when excited.
Winter Adult: black areas on the front and top of the head turn white and speckled black on the crest. This can happen as early as June, more usually from July onward. ....
Similar species
Gull-billed Tern is superficially similar in plumage, but differs structurally, with longer legs, shorter broader wings (more gull-like in flight), shorter, thicker, all-black bill, no crest, and a pale grey rump.
Lesser Crested and Elegant Terns are structurally very similar, but differ in their bright orange bills, and in Lesser Crested, also a pale grey rump, and in Elegant, a longer bill.
Juvenile Roseate Tern has a similar scalloped mantle pattern, but is smaller, has a darker forehead, and a longer tail.
Distribution
A breeding summer visitor widely on the coasts of Europe and southwestern Asia (Estonia west to Ireland, and western France, and east through the Mediterranean from northeast Spain to the Black Sea and Caspian Sea), wintering on the west and north coasts of Africa, the Arabian Sea, and locally of western India. A separate (sub)species (see Taxonomy, below) breeds on the Atlantic coasts of North and South America, wintering additionally on the Pacific coast of northern South America.
If you're looking for a particular bird, place, or anything else related to the birding world, try searching for it using the search box at the top, or to the left, of this page. You can also get an overview of all the birds, bird song, locations or other wildlife by using the tabs above.
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