The last green one is a Manchurian revenue stamp. For more info: Manchukuo Stamps
Here is the info on the pink & yellow one; it's from a sheet of 12; Scott #2838a-l Yours is #2838h. (The original design was from Dec., 1981 - Scott #2273) Sorry for the fuzzy image here - difficult to scan catalog near the spine!
I believe to first one is Scott #1651 from March 1970; "Agricultural Meteorological Station" From the 10th annual World Meteorological Day.
FINALLY found that bird! Scott #3223
Great to re-marque how FRIENDLY is Scott catalog in locating a stamp! Soon one more to come. I know, this site is amassing, thanks everybody. VirgilP.
