Little Tern

The little tern is a small seabird that breeds on coasts and inland waterways of Europe, Asia, north and west Africa and eastern Australia, and winters in subtropical and tropical oceans as far south as South Africa and Australia. Four subspecies are recognised. The subspecies sinensis is resident on the river systems of Pakistan and northern India, Sri Lanka and eastwards to south-eastern Asia, the Philippines and northern Australia. The North American and Red Sea forms are now treated as separate species (Wikipedia, general species account).