Nick Upton / Mouse spider (Scotophaeus blackwalli) female on a bedroom wall, Wiltshire, UK, October.

Steve Downer / Female Ground spider (Gnaphosidae) in silk nest with spiderlings, England, UK.

Steve Downer / Female Ground spider (Gnaphosidae) opening web to release hatching spiderlings, England, UK.

Steve Downer / Female Ground spider (Gnaphosidae) in leaf chamber guarding her egg sac, England, UK.

Steve Downer / Female Ground spider (Gnaphosidae) sealing her egg sac into a leaf chamber, England, UK.

Steve Downer / Female Ground spider (Gnaphosidae) sealing her egg sac into a leaf chamber, England, UK.

Steve Downer / Slow motion clip of a female Ground spider (Gnaphosidae) next to her egg sac, England, UK.

Steve Downer / Close-up of a female Ground spider (Gnaphosidae) next to her egg sac, England, UK.

Steve Downer / Female Ground spider (Gnaphosidae) next to her egg sac, England, UK.

Brent Stephenson / Flattened bark spider (Hemicloea rogenhoferi) camouflaged against tree trunk, Silver Range, Hawkes Bay, New Zealand, September.

MYN / Niall Benvie / Mouse spider (Scotophaeus blackwalli) in the field studio, Belgium, May.

Pascal Pittorino / Spider (Drassodes sp) against white background, Var, Provence, France, March.