Missing Mobs

I find that alot of animals are missing in Minecraft, especially the tundra. You would think there would be deer & moose in Minecraft, but there isn't, which would really fit the game. Birds need added also. Robins, Blue Jays, owls & more. It's surprising that butterflies haven't been added yet either. Penguins, polar bears, reindeers, walruses, woolly mammoth, sabre tooth cat, & caribou could make the tundra more alive. The savanna feels dead big time. Elephants, Giraffes, zebras, thompsons gazelle, tiger & lions, if added will definitely fix this issue. Some other mobs for Minecraft should be: Raccoons, possums, hippos, monkees, flies, wasps, hornets. Adding extinct animals would be swell. I should mention the ocean needs more too. Orcas, Mermaids, shrimp, sharks, stingrays, hammerheads, crabs/lobsters, oysters & much more. Also the dalamation dog breed is truly missing. If all this was added Minecraft would for surely feel much alive. It needs to be said that it's totally surprising none of these are in the game. This is much needed & overdue. It would swell to see these added. Thanx for your time reading this matter!