territorial

territorial (of an animal, bird, etc.) guarding and defending an area of land that they believe to be their own แสดงความเป็นเจ้าของที่หรืออาณาเขต

(rhinoceros beetles) are territorial, but kwang fights are not to the death.

Kwang

Hornets may be the most territorial insects on earth, since they will without fail try to kill you if you threaten their nest.

By nature wolves are very territorial animals.