More variety for biomes

It would be real swell if biomes could have more mob diversity. I mean, the arctic biomes are kinda boring  with just polar bears roaming. Wooly Mammoths, penguins, seals, snow lions, heck even walruses will be real nice. The ocean could have shrimp and some more added danger with stingrays, and jellyfish. Oysters & clams would nice too, as with seagulls, sea-lions and otters. The savanna could use a haul too. Cheetahs, lions, zebras, giraffe & thomson's gazelle. Elephants can get tamed with peanuts. The jungle could use some monkeys, which can be tamed with bananas. Also gorillas and The overland could use ladybugs, ants, wasps, butterflies, raccoons, squirrels, chipmunks and possums. Other mobs that would be great are as followed:

Flamingos, hippos, platypus, beavers, alligators, crocodiles. I also should mention that fireflies would be a great addition to the night as with moths. But yeah. If these mobs were added, the world would be much more alive. Also, it would be cool to have brown cows, which can produce chocolate milk. Chocolate milk would be different but cool and fun in Minecraft. I bet other chocolate lovers (not just me) would love to see some form of chocolate in minecraft. Thanks for the time reading. and thank you guys reading for the votes. Much love and appreciation. Keep up the hard work Mojang.