As much as I hate to admit it, one of my favorite aspects of this movie is the mantis' ability to roar like a dinosaur. The idea of a "roaring" insect is obviously preposterous...but it absolutely works in this fun, entertaining '50s monster flick.
This movie has long been available on VHS. Universal released The Classic Sci-Fi Ultimate Collection Vols 1 and 2(sold separately or packaged together) in 2008 to official R1 DVD and this release includes The Deadly Mantis(1957). I own both of these DVD sets which also feature some of Universal's most recognizable and successful sci-fi monster movies from the decade of the 1950's.
A trailer for this film:
To see the packaged DVD release for sale at Amazon click the link: The Sci-Fi Ultimate Collection on DVD