But since 2006, the city has added more than 64,000 people. The new census numbers, however, suggest that the population rise has slowed. Philadelphia added only about half as many residents in 2013 as it gained in 2011 and 2012. Between 2010 and 2012, the cityâs population grew by more than 1.3 percent. The cityâs growth last year primarily stemmed from births and foreign immigrants.
1 Genera & species: There are more than 100 genera and about 2,300 species of wolf spiders; 200 species live in the United States. 2  The Carolina wolf spider (Hogna carolinensis) is the official state spider of South Carolina, which is the only state that has a state spider.nlike most spiders that catch their prey in webs, wolf spiders violently hunt it down using their strong bodies and sharp eyesight. These spiders also exhibit unique parenting habits that are of great interest to scientists.
Wolf spiders resemble nursery web spiders (family Pisauridae), but wolf spiders carry their egg sacs by attaching them to their spinnerets (Pisauridae carry their egg sacs with their chelicerae and pedipalps).