Cockroach Research

Cockroaches have survived for millions of years in various forms, with species of roaches today numbering around 4,000. It should not be surprising then that scientists continue to study the resilient cockroach - a pest that seems to be able to adapt and live through whatever nature or humans throw at it. In fact, throwing things at cockroaches is at the core of a new study on how cockroaches keep their predators guessing.

According to a report in Science Daily, when roaches flee from predators they seem to run randomly along one of several preferred escape routes. Their very unpredictability aids their escape from harm. This alone seems intuitive - but these bugs have been studied for many years as a model for understanding animal escape responses. Apparently, cockroaches most often choose an escape path directed at a 90 to 180 degree angle from the attack. Trying to stomp on a fleeing cockroach? This only gives you a slight advantage - they are among the fastest of insects.

In another study, 50 roaches were placed in a situation where they had a choice of three hiding places, each with a capacity for 40 cockroaches. When startled, the bugs ran to two of the hiding places, leaving the third empty. If given a choice that included a shelter that would house them all, they preferred the one shelter and left the other two empty. They seem to use two pieces of information to decide on where to hide: (1) How dark is it? and (2) How many friends are there? We use the term "friends" loosely, as there is no evidence that cockroaches live in social groups.

If you are interested in knowing more about cockroaches and studies about these small creatures, click here for a bibliography of cockroach books and articles.