In spiders, for instance ... The differences are minimal, and it’s not always easy to tell a female and a male wolf apart.

Adult female wolf spiders are unique among arachnids ... they molt several times before reaching adulthood. Most male wolf spiders typically live for one to two years, although females may live ...

A new species of wolf spider was recently discovered in ... Intrigued, scientists collected male and female specimens by hand and preserved them in ethanol for further analysis.