Here's a "cold case" to investigate.
Check your backyard or neighborhood park and see if a praying mantis has deposited an egg case on a tree limb, plant or fence.
Case in point: Over at the Harry H. Laidlaw Jr. Honey Bee Research Facility, west of...
THIS EGG CASE on a potted plant outside the Harry H. Laidlaw Jr. Honey Bee Research Facility, UC Davis, will yield from 100 to 200 tiny mantises next spring when the weather warms. A praying mantis recently deposited her eggs on the plant. (Photo by Kathy Keatley Garvey)
ARE YOU A PREY?--A pugnacious praying mantis eyes the photographer. (Photo by Kathy Keatley Garvey)