The spider catches flies in its web.

He is catching flies with his bare hands.

He flies a kite in the park.

He flies the kite in the park.

I saw a swarm of hawthorn flies near the river.

I saw a swarm of fire-flies lighting up the night sky.

I saw many honeymoon flies during my vacation.

Robber flies are known for their predatory behavior.

Assassin flies are predatory insects that resemble wasps.

I saw a swarm of greenbottle flies in the garden.