| Scientific name | Sterna hirundo |
| English name | Common Tern |
| Japanese name | 鯵刺 |
| Class | Aves |
| Order | Charadriiformes |
| Family | Ternidae |
| Genus | Sterna |
| Species | hirundo |
| Subspecies | --- |
| Full length | 36cm |
| Distribution | A migratory bird that flies to coasts all over Japan. |
They are about the same size as pigeons, but appear slightly smaller than gulls.
The head above the eyes is completely black, making it look like it is wearing a helmet. Both sexes are the same color. The beak is completely black. Young birds have reddish beaks. The tail feathers are swallow-tailed and pointed.
They make a high-pitched "ki" sound when taking off.
They fly to the coast and tidal flats as migratory birds. They dive into the sea to catch and eat fish. They hover just before diving.
I photographed a single bird at Sanbanze in early spring. It was resting at the water's edge among other gulls, including black-headed gulls. After observing for a while, it started preening its feathers. It looked much larger than a little tern.
Introducing a picture of Common Tern.