Thousands of tiny flies in lawn

50Twuncle

After cutting the lawn this afternoon - I noticed thousands of tiny green/white flies in the grass

What are they, are they causing any harm to the grass and how do I get rid of them ?

Farway

I don't know what they are but no doubt the birds do & will assist in clearing the food you have provided

50Twuncle

Farway said:

I don't know what they are but no doubt the birds do & will assist in clearing the food you have provided

They are virtually unnoticeable - so tiny - wouldn't fill the beak of a wren!
Don't know whether the maggots are eating the grass roots though 

Davesnave

If they are not easily identifiable and you can't capture them in a photo, it's unlikely they are offering any great threat to your lawn. There are plenty of identifiable things to worry about, so why do you want to waste time trying annihilate these small creatures, whatever they are?