Mammals:
* Large mammals: Brown bear, European wolf, European bison, red deer, roe deer, wild boar, European lynx, Carpathian chamois, wild cat, European otter, beaver
* Smaller mammals: Squirrel, hare, hedgehog, fox, badger, polecat, dormouse, bat species (including the rare Greater Horseshoe bat)
Birds:
* Birds of prey: Golden eagle, griffon vulture, Egyptian vulture, saker falcon, kestrel, buzzard, owl species
* Other birds: Woodpecker, robin, jay, blackbird, cuckoo, nightingale, crane, stork, hoopoe, wild goose, wild duck
Reptiles and Amphibians:
* Reptiles: Grass snake, viper, lizard species
* Amphibians: Frog, toad, salamander
Fish:
* River fish: Carp, catfish, trout, pike, perch
* Black Sea fish: Tuna, mackerel, bonito, anchovy
Insects:
* Butterflies: Numerous species, including the rare Apollo butterfly
* Beetles: A large variety of beetle species
* Other insects: Ants, bees, wasps, dragonflies, butterflies
Endangered Species:
* European bison: Reintroduced in the Carpathian Mountains and now thriving
* European lynx: A rare and elusive predator that is slowly recovering in Romania
* Griffon vulture: Facing challenges from habitat loss and human disturbance, but numbers are increasing
* Saker falcon: A critically endangered bird of prey that is being protected in Romania
Domestic Animals:
* Horses: Romanian breeds like the Huțul horse are known for their strength and endurance
* Sheep: Several local breeds, like the Tsigai sheep, are raised for their wool and meat
* Dogs: The Romanian Carpathian Shepherd Dog is a large and loyal breed
* Cats: Common household pets, with some local breeds
This list only scratches the surface of the rich biodiversity found in Romania. The country's varied landscapes, from the Carpathian Mountains to the Danube Delta, provide habitats for a wide range of animal species.