Thanks Orhan Kahya. There are some beautiful stamps on this cover!
This cover from Singapore has 2 types of stamps:
1) 45 Cent Yellow Wagtail "Motacilla flava" :
The Yellow Wagtail (Motacilla flava) is a species that breeds in much of temperate Europe, Asia, and amazingly, Alaska. It resides in the milder parts of its range, such as western Europe, but northern and eastern populations migrate to Africa and south Asia.
2) 5 Cent White-collared Kingfisher "Todirnamphus chloris" :
The White-Collared Kingfisher (Todiramphus chloris) is a medium-sized kingfisher . It is also known as the Collared Kingfisher or Mangrove Kingfisher. It has a wide range extending from the Red Sea across southern Asia and Australia to Polynesia. It is a very widespread species, with over 50 subspecies currently known.