Common Spider Species

Most spiders prefer living outdoors, but all too often, you may run across a few spiders that have found their way indoors in search of food and shelter. Learn more about the life cycles and habits of these 8-legged creepy crawlers that are commonly found in Singapore.

Singapore: Psechrus singaporensis, Plexippus petersi

Yellow Sac Spider

(Cheiracanthium spp.)

Appearance

  • Pale in colour, abdomen can be yellow or beige with a faint dark stripe running lengthwise.
  • 1/4 to 3/8 inches long
  • 4 pairs of legs, the 1st pair longer than the 4th.
  • Eight similarly-sized dark eyes arranged in two horizontal rows.

Life cycle

  • A female produces around 5 egg sacs each with 30 to 48 eggs. The female may produce several egg masses during her lifetime.
  • Approximately 30 percent of adult males get eaten by females after mating.

Habits

  • Feeding — usually small insects.
  • Location — they build a silken tube or sac (instead of a web) in a protected area which is used as their daytime retreat.
  • Visibility — they emerge at night to look for food. They drop to the floor to seek cover when disturbed.