The Daily Species #20:
Peppered Jumper (Pelegrina galathea)
Pelegrina galathea, commonly known as the Peppered Jumper, is a species of jumping spider. It is endemic to North America, occurring from Canada to Costa Rica.
The jumping spider family (Salticidae) contains more than 500 described genera and about 5,000 described species, making it the largest family of spiders with about 13% of all species. Jumping spiders have some of the best vision among invertebrates and use it in courtship, hunting and navigation.
These spiders are generally diurnal, active hunters. Their well-developed internal hydraulic system extends their limbs by altering the pressure of body fluid (hemolymph) within them. This enables the spiders to jump without having large muscular legs like a grasshopper. Most jumping spiders can jump several times the length of their body.