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