"We are animals."
Translation:Nous sommes des animaux.
I just was wrong in a different exercise where I used for "We are cousins" >> "Nous sommes des cousins". Correct answer was: "Nous sommes cousins". I understood that for être we usually omit the des. Now when I try "Nous sommes animaux" I am wrong again, and the correct answer is with "des". Can someone explain me what is the rule??