Dictionary.net

filled to overflowing with a vast number of moving or especially living things; sometimes used in combination; "ditches alive with frogs"; "a blanket alive with fleas"; "roads crawling with cars"; "a picnic table crawling with ants"; "a house overflowing with guests"; "fields overrun with locusts"; "swarming with insects"; "parade route swarming with spectators"; "a drop of water teeming with microorganisms"