but rarely bite man; only a few are dangerously venomous. Silk spun from the spinnerets is used in the construction of webs, snares, shelters, and egg sacs. Many spiders do not build webs; they forage or lie in wait for their prey. Webs of different spiders vary in form: many (called orb webs) are more or less circular, with spirally wound strands of sticky silk and radiating strands that are not sticky; some are sheetlike or funnel-like; others are irregular. Sexes of spiders can usually be distinguished by the pedipalps — slender in the female, somewhat clubbed in the male. The male is often smaller than the female and not as frequently seen. In some species the female kills and eats the male after mating.

0 0

Post a comment