Primitive Forest: From the Start, I Have a Nile Crocodile

The Protagonist Is Incredibly Powerful and Huge, an Ancient Primordial Beast

Please Recommend Stories Where the Protagonist Is Reborn as an Animal, Preferably a Wolf, Scorpion, or Crocodile

Looking for Novels Where the Protagonist Only Evolves, Never Takes Human Form, and Has No Female Lead

Like "The Cellar World Turned Me Into a Mutant Beast, Shocking All of Humanity". Please!!!!!

Novels Where the Protagonist Turns Into an Animal

Fantasy or modern settings are both fine.

Animal Transformation, Evolution, Shapeshifting, and Spiritual Qi Revival

Turning into an animal during a spiritual qi revival.

Reborn in the Apocalypse as an Eagle, Golden Eagle, Gorilla, Tiger, or Monkey

The apocalypse begins, and the protagonist is reborn as an eagle: a golden eagle, a gorilla, a tiger, a monkey, an ape.

Megalodon, Jurassic Park, and Anaconda

Modern setting, really awesome, and about fighting giant beasts from the natural world. No supernatural elements.

The Male Lead Is Reborn as a Lion in Africa. He Starts as a Cub and Goes on to Dominate the Continent

Must have a System

A Novel in Which the Main Character Turns into a Bird! No Need for a Harem, Not Dark but a Bit Cozy

A novel in which the main character turns into a bird! No harem! Book shortage!

Reborn as an Animal, I Devote Myself to Protecting China

Do you have any? I really want to read something like this.