During the cold winter months, when water birds rest, they often see their heads and necks plunged into feathers on their backs.
Many birds have their head and face covered with feathers, but their beaks and eyelids have exposed skin.
If you plung your neck into the back, all exposed parts of the skin are covered with feathers, reducing the emission of body temperature.
In some cases, one leg is hiding on the feathers of the stomach by changing left and right.
The image at the beginning shows a calm afternoon during the cold and resting comfortably in the pool of the piers of Chuo-ohashi Bridge.
At first glance, he seems to be facing forward, and in fact he is turning his neck almost 180 ° and resting with his beak in his back wings.
A humorous and acrobatic posture.
Occasionally, I also show the gesture of mending the back feathers.
In general, birds cannot move their eyes very much, but they have more cervical spine than mammal, which is said to be able to move their neck flexibly.
Although it is generally difficult to distinguish seagull species, it is relatively easy to identify the three species of seagull, commonly found in the mouth of the Sumida River.
Seglocame> Larger than crows. His legs are light red. The beak is yellow and red spots at the bottom of the beak.
<black-tailed gull> Medium-sized (crow size). The legs are yellow. The beak is yellow and red and black at the tip of the lower beak.
Squirrel> Smaller than crows. The legs are red. The beak is red and the tip is black.
