Animals:
* Marmot: A large, burrowing rodent found in mountainous regions of North America, Europe, and Asia.
* Mole: A small, burrowing mammal known for its underground tunnels.
* Mongoose: A small, slender carnivore found in Africa, Asia, and southern Europe.
* Mule Deer: A large deer species found in western North America, known for their large ears.
* Meadow Vole: A small, mouse-like rodent commonly found in meadows and grasslands.
Plants:
* Marigold: A genus of flowering plants known for their bright yellow or orange blooms.
* Milkweed: A genus of flowering plants known for their milky sap and importance to Monarch butterflies.
* Millet: A type of cereal grain commonly grown in grasslands.
* Mountain Bluebell: A wildflower species that blooms in grasslands and meadows.
* Meadow Rue: A genus of flowering plants that thrives in moist meadows and grasslands.
These are just a few examples, and there are many other grassland animals and plants that begin with the letter "M".