Spiders don’t produce urine like we do, but produce uric acid, which doesn’t dissolve in water and is a near-solid.
In this sense, spiders don’t deposit separate feces and urine, but rather a combined waste product that exits from the same opening (anus).
Do insects poop and pee?
This is assuming that the question defines peeing as “expelling liquids from the rear end.” Not all insects really do that. Most insects will leave mucky droppings as sole forms of excrement. Caterpillars, for instance, don’t pee but they do poop a lot—leaving little black bags around plants.
What does a spider poop look like?
Spider droppings are a combination of digested food (insects) and waste products. The droppings look like pin head-size splats or drips in shades of white, gray, brown, or black. You’ll find the droppings on surfaces below where you find spiders.
Is Spider poop toxic?
There is also research that found pathogenic bacteria in the feces or droppings of flies (Kobayashi et al. 1999). However, little research has been done characterizing the microbiological inhabitants of spiders and their droppings. Overall, there were no bacteria identifiable in the spider fecal material.
Do spiders excrete?
Most spiders convert nitrogenous waste products into uric acid, which can be excreted as a dry material. Malphigian tubules (“little tubes”) extract these wastes from the blood in the hemocoel and dump them into the cloacal chamber, from which they are expelled through the anus.
Photo in the article by “Flickr”