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Black-widow Spiders:
black-widow spiders are found all over the world in almost any situation and any location.
black-widow spiders are benefactors to man as they consume innumerable destructive insects. There is but one species of spider in the United States which to date has been proven to be deadly poisonous to man. This is the black widow spider.Regardless of common names, the black widow belongs to the comb-footed black-widow spiders which possess a row of strong, curved bristles on the last pair of legs. These bristles or combs are used to throw spider silk about the body of any prey that becomes entangled in the ragged webs.
See Also Feed Spiders:
In the wild, trap-door spiders feed spiders on a large variety of insects and other arthropods. All food must be alive. Give quantity of any available insects; also give sow bugs, pill bugs, other spiders. Trap door spiders do not forage for food; lie in wait at night with door slightly raised and grab prey as it crawls by. In captivity, teach speci¬men to feed spiders before night by gently dragging food along close to trap door at same time each feed spidersing. Water—Not as essential as to other spiders, but must be offered occasionally; use small, flat con¬tainer; place close as possible to trap door.Spiders are divided into two tundamental groups or suborders, the Mygalomorphac, or mygalomorph spiders, and the Araneomorphae, the true spiders. Mygalomorph Spiders. — The mygalomorph spiders are more generalized than the true spiders and ancestral to them. Their chelicerae are paral¬lel with the long axis of the body and move up and down; and each fang pierces the prey from above, making similar parallel punctures. All retain two pairs of book lungs for respiratory organs.
On The Other Hand See Trap-door Spiders Hardy:
damage nest; spider will not attempt to escape but will hold firmly to its door; collect a quantity of the surrounding soil as it will be needed in the captive habitat Trap Door: Doors on trap-door spiders hardy-spider tunnels vary according to the kind of spider making them; "wafer" type door covered with nothing more than silk; "cork" type is made of silk combined with soil; spider sits with door partially open and grasps any unwary in¬sect that comes along The trap-door spiders hardy spiders are hardy in captivity when their runnels are properly placed in soil and they are properly fed.In the trap-door spiders hardy spiders (Ctenizidae) the elaborate tubular burrow is used chiefly as a shel¬ter for the adult, but may be considered a nest, since the eggs are laid within. In some cases the tube may be of considerable length, even branched, and may have a tightly fitted trap door camouflaged from the outside so as to be almost invisible. Perhaps the most remarkable spider nest is that made by the water spider (Argyroneta) : a silken bag built under water and containing air brought from the surface enclosed in the spider's legs. The whole structure is like a diving bell and serves as an admirable shelter for both adult and eggs.
