From The Internet Movie Plane Database
David Duchovny (Dr. Ira Kane)
Julianne Moore (Dr. Allison Reed)
Orlando Jones (Prof. Harry Block)
Seann William Scott (Wayne Grey)
Ted Levine (Gen. Russell Woodman)
Ethan Suplee (Deke Donald)
A meteor crashlands on Earth bringing with it alien microscopic lifeforms which, due to Earth's warm atmosphere, begin evolving into increasingly larger and more dangerous animals.
Seen briefly flying over Ira and Harry's Jeep.
Two are seen following the Twin Huey.
Governor Lewis' helicopter. Reg. N902EH, serial 45769.