If a spider is unfortunate enough to lose a leg, then provided it still has at least one more moult left in its life cycle it's able to grow a new leg. In most species the new leg is thinner and shorter than the original leg. It can take two or three moults until the regenerated limb matches the original in appearance.
Regarding this, can a spider self heal?
'Spider threads' bring great self-healing power. Researchers have already developed composites that are able to heal microscopic cracks, but it's hard to include enough repair material to close larger cracks in this way. Li realised that, like human wounds, such large gashes must be closed before healing.
Do spiders die off in the winter?
Spiders in Winter. Others, however, will die in the winter but leave their egg sacs well protected to hatch out the next spring. Some actually do prepare for winter by weaving a web under loose bark or building overhangs where they are insulated from the cold. Spiders are cold blooded.
How are spiders helpful to us?
1. Spiders eat pests. Spiders feed on common indoor pests, such as roaches, earwigs, mosquitoes, flies and clothes moths. If left alone, spiders will consume most of the insects in your home, providing effective home pest control.