Interesting story of the butterflies of the local butterfly farms

There are a few butterfly farms in Malaysia. I always thought that the butterflies housed in these butterfly farms are bred within the farm themselves, however, the truth is NOT. I am told that butterflies are very difficult to be bred , the chances of having the bred butterflies within the farm are very slim, hence, the owners have to purchase live butterflies from the external source and set them free to the farm. The main supplier for these live butterflies are the "Orang Asli" of Malaysia. Believe it or NOT ?

• A maximum card realised with "Birdwing butterfly" stamp, FDI pictorial cancel @ Singapore