Answer:

pterodactyl

Answer	Crossword Clue
PTERODACTYL	Flier of long ago
PTERODACTYL	"King Kong" flier
PTERODACTYL	Jurassic flyer

PTERODACTYL	Prehistoric menace
PTERODACTYL	"T" as in prehistoric flyers

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.