Spider Species

The majority of spiders cannot harm anyone and it is very uncommon for people to be bitten by them. To avoid any unnecessary encounters, there are a few things that you can do to ensure you keep spiders away from your home.

They are unpleasant to look at and their webs can cause a mess if they infest your home or business. From Common House Spiders to Black Widows, we can give you more information about these creatures to help you get over your fears.

Black Widow Spider

(Lactrodectus spp.)

Black Widow

Appearance

  • Color: typically black, underneath side has 2 reddish triangular markings usually joined to form a reddish hour glass-shaped figure on females.
  • Females are overall length of 1 1/2- 1 3/8” long
  • Males are about half the size of females.

Lifecycle

  • Females can lay a maximum number of egg sacs ranging from 6-21, with about 185-464 eggs per sac.
  • Adult females can live 822-952 days and adult males 127-196 days.

Habits

  • Outdoors they commonly live in protected places.
  • Indoors, they are typically found in seldom used parts of garages, basements and in crawl spaces.

Brown Recluse Spider

(Loxosceles reclusa)

Brown Recluse Spider

Appearance

  • 1/4 to 3/4 inch long.
  • Brown or deep yellow color.
  • Long, thin, brown legs covered with fine hairs.
  • Six eyes, arranged in pairs in a semicircle.
  • Often called ‘fiddleback’ or ‘violin’ spiders because of the violin-shaped marking on the top surface which points from the head area toward the abdomen.

Lifecycle

  • Eggs are laid primarily from May to July.
  • The female lays about 50 eggs in an off-white silky sac approx 2/3 inch diameter.
  • Spiderlings emerge around 1 month later.
  • It takes on average one year to reach the adult stage.
  • Adults can live 1-2 years.

Habits

  • Locations - They prefer secluded, dark, undisturbed sites indoors or outdoors. Indoors, they may be found in attics, basements, closets, ductwork, in storage boxes, shoes or behind furniture. Externally they may be found in barns, storage sheds, garages, under logs, loose stones and stacks of lumber.
  • Feeding - They preferring dead insects. They can survive about 6 months without food or water.
  • Visibility - The sac serves as the spider's daytime retreat. They tend to look for food at night.
  • Bite – They only bite when crushed, handled or disturbed. Both sexes are venomous. A human’s reaction to the bite depends on the amount of venom injected and an individual's sensitivity to it - some people are unaffected, others may feel a pinprick, others a stinging sensation followed by intense pain. Some may not be aware of the bite for 2 to 8 hours.

House Spider

(Achaearanea tepidariorum)

House Spider

Appearance

  • Adult – body length excluding legs 1/4" – 3/8". Yellow brown body with faint markings. Abdomen pale grey brown with short hairs.

Lifecycle

  • The egg sac produced by the female is spherical, covered with a layer of silk and placed within the web structure.
  • The male will mate several times with the female before dying.
  • Adults may live for several years.

Habits

  • Found in buildings, sheds and walls.
  • This spider produces a sheet web.

Tarantulas

(Dysdera crocata)

Tarantula Bug Book

Appearance

  • Adult body length excluding legs – 1"- 5". Most tarantulas have black or brown hairy bodies and legs but some species exhibit striking colors.

Lifecycle

  • Mating season is in autumn. Incubation of the young takes 6-9 weeks, with each female producing 500-1000 eggs into a silken cocoon. The young leave their burrow after 2-3 weeks.
  • Life span 25-40 years.

Habits

  • There are 60+ genii and 800+ species of tarantula.
  • Tarantulas prefer to live in dry, well-drained soil where they dig a burrow which is lined with silk webbing.