Cockroaches are normally nocturnal, active at night, unless you have an infestation – when overcrowding and a lack of food sources can cause them to brave the daylight in order to survive. The majority of cockroaches we have here are German cockroaches, although they’re not even originally from Germany and in Germany they’re often referred to as “French” cockroaches. Cockroaches hide and live in dark, moist areas behind fridges, sinks, and other appliances but since they spend about 75 percent of their time in the wall cracks and voids, infestations are almost always larger than they appear. With their ability to flatten their bodies, they can fit in small areas, including cracks in your walls. Roaches eat everything from people food to garbage and even feces, but their active metabolism turns this hunger into one of the most telltale signs of cockroaches: a significant amount of feces. The appearance of roach feces can vary from tiny specks of pepper, brown stains, and coffee grounds to oval pellets similar to mouse droppings. Infestations continue to grow rapidly because cockroaches are very aggressive breeders. They also produce a pungent, musty odor that gets worse the longer the infestation goes on, also odors arising from dead roaches as oleic acid is produced during decomposition. Due to their unhygienic eating habits, roaches can pass harmful pathogens through their droppings contaminating surfaces and food where they crawl. Cockroach saliva and vomit are also responsible for spreading microorganisms. There are over 60 pathogenic bacteria, fungi, moulds, parasitic worms and viruses that are carried by cockroaches.
gogreenpestcontrol.ca & Exterminators Delta Ladner Tsawwassen, Randy L. Bilesky BsF CPA RPF
http://gogreenpestcontrol.ca/cockroaches-do-you-have-them/
https://www.delta-optimist.com/opinion/blogs/blog-do-you-have-cockroaches-1.23473878