This isn’t a logline. A logline is a concise summary of the plot up to either the midpoint or the beginning of the final act, using (ideally) no more than 40 words and phrased as a single sentence (maybe two).

At the moment, you haven’t specified any conflict that our protagonist is experiencing. Her father faces conflict, but she doesn’t. So why are we following her story? She needs a goal, obstacles, the incident that kicks her story off, and, most importantly, a hook.

There’s something here for sure.

I don’t think the snake attack can be said to threaten his species with extinction when there’s another colony 250km away. It can threaten his colony, but we already know there are others. How does the kangaroo rat know there’s another colony? Or is his quest to find others and he doesn’t know if there are any more? Either way, write it from his perspective.

“A sheltered kangaroo rat must lead the desperate survivors on a perilous journey across the desert to find more of their kind after a vicious snake attack decimates the colony.”

I can’t decide if it’s better for him to go alone and then cut back to the remains of the colony who are eagerly awaiting his return with reinforcements, or for him to have the responsibility of looking after everyone left. Go with the story you want to tell.

Keep going with this.

Hope this helps.