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The red-billed gull is a fairly small gull with an all-red bill, red eye ring, red legs and feet, pale grey wings with black wingtips. The rest of the body and tail are white. There is virtually no visual difference between the male and female birds.
The little gull has a body length of 24 to 28 cm (9.4 to 11.0 in) and a wing span of 62 to 69 cm (24 to 27 in), [7] making it the smallest gull species in the world. [8] The adults in breeding plumage have a black hood, dark red bill, bright red legs and a rosy flush to the underside.
The eyes are dark in some species, or with a distinctive white iris in others; the legs and bills are bright to very dark red. [ 6 ] Representatives of this genus are found in regions/subregions all over the world, except for Antarctica; the species are often parapatric , but with two species together in New Zealand, the Mediterranean region ...
Hartlaub's gull is 37–39 cm in length, with a wingspan of 89–92 cm and a weight of 235–340 g. It is a mainly white gull with a grey back and upperwings, black wingtips with conspicuous white "mirrors", and a dark red bill and legs. When breeding it has a very faint lavender grey hood, but otherwise has a plain white head.
[9]: 556 The legs, too, change from black to dark red and even bright red as the breeding season progresses, "possibly stimulated by presence of begging chicks and juveniles." [9]: 556 Observations suggest the gull is sexually dimorphic, but there is a lack of published data to support this.
The American herring gull or Smithsonian gull (Larus smithsonianus or Larus argentatus smithsonianus) is a large gull that breeds in North America, where it is treated by the American Ornithological Society as a subspecies of herring gull (L. argentatus). Adults are white with gray back and wings, black wingtips with white spots, and pink legs.
The thick bill is blue with a yellow tip, and the legs are black. The bill is tipped with red, and the eyes have a fleshy, bright red eye-ring in the breeding season. Its flight call cry is a harsh, tern-like keeeer. It has many other vocalizations, including a warbling "fox-call" that indicates potential predators such as an Arctic fox, polar ...
This small bird is similar in size and some plumage characteristics to the little gull. It is slightly larger and longer winged than the little gull, and has more pointed wings and a wedge-shaped tail. Its legs are red. Summer adults are pale grey above and white below, with a pink flush to the body feathering, and a neat black neck ring.