Spies are beneficial for human beings. Any other examples?

China
March 18, 2017 9:05pm CST
I learned spies eat annually shocking number of harming species in forests and countryside to balance a healthy balance in nature, which is definitely good for human beings. Could you name a few more examples.
1 person likes this
1 response
Anindita Sengupta
@aninditasen (15744)
• Raurkela, India
19 Mar 17
Harming or wild species are going extinct hence I think we should preserve them. Wild species harm only when they have a feeling of being harmed.
1 person likes this