blackcap

Example:The whitecap on the ocean was a clear indication that a storm was on the way.

Definition:nautical term for a white spray or foam caused by wave breaking over the bow of a ship, usually seen in rough seas or during a storm.

Example:A yellowcap, with its bright yellow underparts, landed on a branch nearby.

Definition:a small bird of the warbler family, typically having yellow underparts contrasted with grey or black above.