Lovely stamps from Singapore. http://philatelynews.com/wp-content/uploads/2010/05/philatelynews_know_trees.jpg
Its a 1987 sheet for commemorating 40 years of Pakistan Air force. Each stamp depicts an aircraft which has served Air Force since 1947. 10 stamps in total and all are paintings by Hussainy (a famous aviation artist from Pakistan). I got this sheet recently.
Helvetia stamp featuring two birds for today. http://static3.depositphotos.com/1000943/143/i/450/dep_1433102-Old-pastage-stamp.jpg
Some lovely WWF stamps. http://2.bp.blogspot.com/_gxIOstZmY...gwfmYc/s320/WWF stamps (Trinidad sending).JPG
Sorry I missed your question. I am not sure what is the exact name of those blue chested birds. Usually the stamps here featuring animals have names and even scientific names on the stamp.