Spiders

Spiders are highly adaptable arachnids found in almost every terrestrial habitat. While most species are harmless and beneficial predators, some can become a nuisance indoors or provoke concern due to their appearance or venomous potential.

Facts

Name: Various species across multiple families, including common UK types such as the house spider (Tegenaria spp.), cellar spider (Pholcus phalangioides), and false widow (Steatoda spp.)
Life cycle: Incomplete metamorphosis
Egg: Eggs are laid in silk sacs and hatch into spiderlings
Spiderlings: Spiderlings moult several times before reaching maturity
Lifespan: Lifespan varies by species, ranging from one year to several years
Description:
Spiders are eight-legged arachnids with two body segments: the cephalothorax and abdomen. Most species have eight eyes, though arrangement and number can vary. Size, colour, and web structure differ widely between species. Some build webs to catch prey, while others actively hunt without webs.
Behaviour:
Spiders are solitary and territorial. Web-building species use silk to trap prey and create retreats. Active hunters rely on speed, vision, and stealth. Most spiders are nocturnal or crepuscular. Venom is used to immobilise prey, though few species pose any risk to humans.
Habitat:
Spiders are found globally in nearly all terrestrial environments except Antarctica. Common indoor habitats include basements, attics, sheds, and undisturbed corners. Outdoor habitats range from leaf litter and grass to trees, walls, and rock crevices. Web-building species prefer sheltered, stable locations. Hunting spiders are often ground-dwelling or found on vegetation.