The demographics of who's on what social network are shifting — older social networks are reaching maturity, while newer social messaging apps are gaining younger users fast.

In a new report from BI Intelligence, we unpack data from over a dozen sources to understand how social media demographics are still shifting. 

Here are a few of the key takeaways from the BI Intelligence report:

Facebook still skews significantly female. Women in the U.S. are more likely to use Facebook than men by about 10 percentage points, according to a 2013 survey of social network adoption. 

Facebook remains the top social network for U.S. teens. Nearly half of teen Facebook users say they're using the site more than last year, and Facebook has more daily teen users than any other social network.