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
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 ...
Mar 24, 2009 ... Nobel prizewinner took short cuts to show that the way gulls feed is ... Herring
gull chicks instinctively peck at red spots on their parents' bills to beg for food. ...
idea in animal behaviour was that learning was all-important.
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.
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 ...
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 ...
The red bill spot was significantly smaller (16%) in the oil-fed gulls than in ...
2008a), indicating that oxidative stress plays a key role in regulating such