Information

The spider - Wanted poster


Characteristics

Surname: Spider
Latin name: Araneae
class: Arachnids
size: 0.4 - 10cm
mass: Max. 130g
Older: 1 - 15 years
Appearance: eight-legged, different Colors possible (black, brown, yellow, red)
Sexual dimorphism: Yes
Nutrition type: Insectivore (insectivore)
food: Ants, flies, beetles, ladybirds, mosquitoes, spiders
distribution: worldwide
Sleep-wake rhythm: day or night active
habitat: Forests, meadows
natural enemies: Amphibians, reptiles, birds
sexual maturity: species-specific
mating season: June - October
social behavior: Loners
Threatened with extinction: No
Further profiles of animals can be found in the Encyclopaedia.

Interesting about the spider

  • All spiders have eight legs.
  • Currently about 45,000 spider species are known. Every year more than a hundred new spider species are discovered.
  • The exact cause of spider anxiety could not be clarified until now. Observational learning, however, seems to play an important role. Indigenous people from Indonesia or Brazil, where poisonous spiders are much more common, are not afraid of spiders.
  • Only a few spiders can be dangerous to a full-grown human: i.a. the banana spider, the funnel web spider or the black widow. In allergic persons, however, an otherwise harmless spider bite may lead to an allergic shock.
  • The size of a spider says nothing about its toxicity. The poison of the tarantula (pictured right) is too weak to kill a human.
  • Spiders have tiny organs, including the brain and heart.
  • A spider web consists of sticky and non-sticky spider threads. Only the spider knows which threads it can move on without sticking itself.
  • The smallest spider in the world grows to a maximum length of 0.4 cm (Patu digua), the largest being more than 10 cm (tarantula).
  • On the abdomen of the spider sits the spider gland, with which spider silk can be made. Spider silk is one of the most stable natural substances.
  • The black widow sometimes eats the male after mating.
  • In the course of evolution, spiders have developed different techniques for hunting: weaving spider webs (weaver), digging holes (trap door spider), hunting in the water (water spider), jumping on the prey (bark spider) or spitting venom on the prey (spider spider).
  • For many ecosystems, spiders are indispensable because they significantly reduce the number of insects. (e.g., mosquitoes)