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Red-billed gull - Wikipedia

en.wikipedia.org/wiki/Red-billed_gull

The red-billed gull (Chroicocephalus scopulinus), once also known as the mackerel gull, is a ... Juvenile gulls have a dark brown bill with only hints of red, making them difficult to ... The legs a...

Why Do Gulls Have a Red Spot on Their Bills? | Audubon

www.audubon.org/news/why-do-gulls-have-red-spot-their-bills

Oct 7, 2013 ... This story comes to you through a partnership between Audubon and BirdNote, a show that airs daily on public radio stations nationwide.

Seagull facts and information - The Seagull Who Was Afraid To Fly

www.spwickstrom.com/seagull/

The word Laridae is from the Greek word meaning “ravenous sea bird.” The term .... The bill is yellow with a red spot near the tip of the lower mandible. The back ...

Pecking the Red Dot: Herring Gull Myth or Fiction? - Acronym ...

acronymrequired.com/2009/03/pecking-red-dot-herring-gull-myth-fiction.html

Mar 26, 2009 ... Tinenberg found that the baby gulls will peck at a red spot more ... "One of Nikolaas Tinbergen's most important contributions is that he has ...

Identification Keys and Tips - "Typical" Gulls

sdakotabirds.com/diffids/typical_gulls.htm

Keys and Tips for Identifying "Typical" Gulls - Differentiating between Ring-billed, California, ... in the winter can attract significant numbers of gulls, including the rarities shown on this page. ... Bill: Yellow, with black and red spots on lower bill.

Classic behavioural studies flawed : Nature News

www.nature.com/news/2009/090324/full/news.2009.186.html

Mar 24, 2009 ... Nobel prizewinner took short cuts to show that the way gulls feed is instinctive. ... At the time, the dominant idea in animal behaviour was that learning was all- important. ... Adult gulls have a red spot on their lower bill.

Ring-billed Gull, Identification, All About Birds - Cornell Lab of ...

www.allaboutbirds.org/guide/Ring-billed_Gull/id

Familiar acrobats of the air, Ring-billed Gulls nimbly pluck tossed tidbits from on high. ... look closely, as some other species have black or red spots on the bill.

Herring Gull, Identification, All About Birds - Cornell Lab of Ornithology

www.allaboutbirds.org/guide/Herring_Gull/id

Herring Gulls are large gulls with hefty bills and robust bodies. ... with long yellow bill; Gray back, bright white head and underparts; Red spot near tip of lower bill ...

The Birds of Barnstable Harbor – Gulls - Barnstable Harbor Ecotours

barnstableecotours.com/about/blog/files/Birds_of_Barnstable_Harbor_Gulls.html

Apr 3, 2013 ... Gulls are among the world's most successful species. ... given day, at any time of year, they are likely to be present in significant numbers. ... The smaller gulls have thin bills, without the red spot, ideal for picking out small prey.

Birds of Gulls, Terns, Skimmers (laridae) Family

www.whatbird.com/browse/objs/All/birds_na_147/59/Family/11106/Gulls, Terns, Skimmers (Laridae)/default.aspx

Birds of North America of the Gulls, Terns, Skimmers (laridae) Family. ... Bill is yellow with a red spot near tip; eyes are yellow-gray with red orbital rings; legs and ...

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Herring Gull - | The Wildlife Trusts

www.wildlifetrusts.org

Swooping in and stealing your chips, the herring gull is the 'typical seagull' and is a ... This red spot spurred one of the classic studies in animal behaviour in the 1950s, ... Having seen gull chicks peck at their parents' bills to encourage them to  ...

FUNCTION OF COLOURED BILL TIPS, STRIPES AND SPOTS IN ...

www.marineornithology.org

Some species of gulls have uniformly coloured bills, but many. (62% of the species in ... (i.e. a red tip or spot), whereas smaller-billed species have uniform bills. We therefore ... The importance of taking phylogenetic effects into account during.

Identification of Pacific Northwest Gulls · University of Puget Sound

www.pugetsound.edu

Comments on Identification of Certain Adult Gulls of the Pacific Northwest .... Larger gulls have relatively thicker bills, an important aid in judging size, especially ... Caution: All of the larger gulls with red bill spots, as their bill changes color with ...