They are not acting like males. They have exhibited SOME characteristics normally exhibited by males.
The headline says “start acting like males”. The article says “even behave a bit like males”. As always, the headline deliberately states something that the article doesn’t.
The headline is designed to make you read the article. The author hopes you forget what the headline said and that you don’t criticize it for its lying hype, as I’m doing.
This sounds as if there’s been a few years of interbreeding going on. Many ‘parks’ raise lions for foreign hunters because it brings a lot of money to the area and the meat is always donated to the villagers.