She kills two birds with one stone by taking the train, finishing her book during the commute and avoiding rush-hour traffic.

When deciding whether to accept the small freelance contract now or hold out for a bigger client, remember that a bird in the hand is worth two in the bush.

By scheduling a client meeting at the co-working space, I can kill two birds with one stone: finalize the contract and inspect the new office layout.

When he tried to sell us that fake investment scheme, we reminded him that you can't catch old birds with chaff.

When he leaked the company's secrets, everyone said it's an ill bird that fouls its own nest.