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Western gull - Wikipedia

en.wikipedia.org/wiki/Western_gull

The western gull (Larus occidentalis) is a large white-headed gull that lives on the west coast of ... Despite being a well-known bird species on the West Coast of the US, it is of some ... It has 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.

Herring Gull - | The Wildlife Trusts

www.wildlifetrusts.org/species/herring-gull

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  ...

Seagull's red dot? (Page 1) - Birds - Ask a Biologist Q&A

www.askabiologist.org.uk/answers/viewtopic.php?id=6899

As I understand, it is used during feeding nestlings. The chicks peck at the red dot and stimulate the parent to regurgitate some delicious ...

Seagull facts and information - Steven P. Wickstrom

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 ...

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

www.marineornithology.org/PDF/37_1/37_1_85-92.pdf

The importance of taking phylogenetic effects into account during comparative .... The phylogeny shows that gulls with a red spot on the lower mandible fall into ...

Classic behavioural studies flawed : Nature News

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

Mar 24, 2009 ... Adult gulls have a red spot on their lower bill. Tinbergen, who shared the Nobel Prize for Physiology or Medicine in 1973, presented wild chicks ...

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.

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.