An update
Those last few years , there have been some interesting trends :
Kyoryuger : we had a female ranger associated for the first time with the classical triceratops, previously only associated with boys.
More interesting, Kyoryuviolet was associated with the badass Plesiosaur (even if as usual, Daigo used it the most). One could argue with the fact that we also had an Ankylosaurus related female ranger with the female Kyoryucyan, but Yuko only became Kyoryucyan once or twice.
Toqger : train show, and the animals associated with the girls in the movie were classic cute animals, wild cat and panda.
Ninninger : another case of "cute animals for the girls" with the white dog and the panda, but we had also for Shiroranger, the white tiger, the badass feline classically associated with girls.
But of course, the most interesting case is the case of Zyuohger, with ALL heroes, male and female associated with badass animals : while the boys had the badass lion, elephant and eagle, the females had the equally badass shark and tiger. The shark is especially remarkable, since it was usually associated with the boys ; when a girl had a marine animal, it was mostly the dolphin. Besides, the heroines are themselves part shark and part tiger.
In fact, it's pretty much Zyuohger which made me bring back that thread to life, because it's probably the first show that pretty much shows male/female equality when it comes to badass animals.
Of course, I don't think girls will be associated ever with lions, but it's logical, since it's the mane that makes the lion a popular choice, and the mane is of course specific to the male : in fact, I feel that the fact females are often associated with the equally badass tiger pretty much is a way to make up for that when it comes to big cats.