Wilson seabirds

Wilson's terns year-round live offshore, their breeding grounds are also off the island. They only come in and out at night to avoid the enemy, even less to enter the nest in the moonlit nights. Because of this, people rarely see them from the mainland.

Wilson leisurely birds are named after the anthropologist Alexander Wilson (1766 - 1813). They are Petrel birds (soft spoken of "Peter" - Saint Peter) because of the strange ability of this petrel type. Their scientific name is Oceanites oceanicus.

Although small in size about 18cm long; the wingspan is about 40cm but all year round they only live on offshore waves, they only fly to the island during the breeding season. Despite their small size, they fly very well, able to retain their position in the air between strong winds of 40 knots.

Every time they hunt, they seem to be jumping on the water , with two wings rising up to form a V and the tail opening like a fan, and the two feet lightly touching the water. The foot has a membrane so it is very suitable for this unique type of performance.

Seabirds Wilson eats most of the plankton and also eats the oil and fat from the bodies of marine mammals such as whales and dolphin dolphins.

The shape of Wilson's terns is also quite noticeable: The upper part of the coat is black, there is a small white part near the tail. When spread out their tail formed a relatively square angle. Long legs, yellow webbed feet. The males and females are very similar in color and size.

Although mostly only in the open sea, they sometimes enter the bay and estuary (usually by cruising). Although they don't have to dive professionally, they can dive for a while to grab food. Usually this type of bird is tight-lipped, but during the time of confession they also make shrill voices. The male and female birds stand together, preening their head hair .

In December to January of the next year, in a cracked stone or in special caves (the male and female), the female spawns only one white fruit. Eggs are replaced by broods and birds during the brooding session, each hamlet lasts about 48 hours and brooding for 39 - 48 days. Young birds are cared for by their parents and fed with food prepared by their parents.

In winter, they migrate from Antarctica to the northern equator of the Atlantic, Indian and Pacific oceans; some migrated to the eastern Pacific. They returned to the Antarctic in November or in mid-December, the ornithologists said that in the world, this Wilson seabird had the largest numbers.

Wilson's birds have a great memory , crowded birds after a year of flying all the way back to their breeding grounds, will return to their old nest. Each such team is maintained from year to year.

In the nesting place, Wilson terns are often killed by the pirate bird Catharacta Stercorarius, the young (sometimes adults) can also die due to the thick snow cover.