Native birds on cover from Palau

This is my first cover from Palau, an island country located in the western Pacific Ocean. The country contains approximately 340 islands, and together with parts of the Federated States of Micronesia, forms the western chain of the Caroline Islands. Its area is 466 square kilometers. The most populous island is Koror, and this cover is sent from that island. Palau shares maritime boundaries with the Philippines, Indonesia, and Micronesia. This stamps are from set The native birds of Palau, issued on 14.4.2000. It's interesting to see machine cancellation on top side, and that probably shows that Palau use US post as mail carrier. 

Here you can see location of Palau.

Thank you, Burak!