The term glomerulonephritis (GN) covers a group of conditions in which there is injury in the glomerulus, the filtering unit of the kidney. This can occur either as a primary glomerular disease, or secondary to drugs, infections or tumours (see Secondary Glomerular Disease, pp 464â466 of this issue).
As insects are spiders' main prey, it is likely that they would impose strong selectional forces on the foraging behavior of spiders. Most commonly found in the sheet-web spider families, some webs will have loose, irregular tangles of silk above them.
Black Widow Spider Diet. Black widow spiders typically prey on a variety of insects, however, they occasionally feed upon woodlice, diplopods, chilopods and other arachnids. When the prey is entangled by the web, the spider quickly comes out of its retreat, wraps the prey securely in its strong web, then punctures and envenoms its prey.