All of the randomly generated mobs we see are land based, which makes me worry if they lack flying creatures. Diversity is what this suggestion asks for, Winged Mobs in general can be anything. Like a bird, dragon, whatever the devs are doing for a theme. However, I don't quite mean penguins, as they cannot fly. Most flying creatures you could see on a Low level planet would be passive. But if you were on a higher threat level planet, you would most likely see something like a Vulture wanting to pluck your bones. Lets say there is a boss mob that can fly, like a dragon I have mentioned. Don't let it discourage you that you cannot follow it to the end of the planet. Fly a space-craft after it, good old fashioned dog fighting sound interesting to anybody? (Yes quite obviously, that's why people fly jets in BF3.)
Today I was just (re-)reading the old updates on the homepage, and I forgot about this: It's from April. They didn't leave them out, don't worry.