Wolf spider

After conception female wolf spiders carry egg sacs for 20 to 40 days depending on species.

An excerpt from the article 16 facts about Wolf spider

Before hatching female spiders are very aggresive, especialy when separated form egg sack which they seek furiously. After hatching they carry spiderlings on ther back till juveniles are ready to star their own lives.

Juvenile wolf spiders often disperse by air, that is why they are able to inhabit so many places.