In English language cow is an offensive word for a woman, and monkey is a child who's playful. But they've got different meanings in Persian language. Here is the connotation of animals in our language, and all of them are offensive:
Cow: an ignorant person or someone who eats too much
example: Look at that cow passing the street without looking at the traffic light.
Fox: a sly person
example: She came into the office pretending she doesn't know anything. What a fox
Donkey: an idiot
example: Hey donkey, it's in that cupboard not this one.
Monkey: a very ugly person
example: Have you seen his wife? She's ugly as a monkey.
Mouse: a coward
example: I shouted at him I don't wanna see him. Hewas quiet like a mouse.
Gorilla: a hairy person
example: If I don't wax my feet I'd soon turn into a gorilla.
Bear: a big person, usually when you want to remind sb they've grown up
example: You're a big bear now and you expect your mum collects you after school?
Buffalo: a very big person
example: His dad is just like a buffalo, about 120 kg.
Finch: a very young person, usually referring to teenagers
example: This finch asked me out. I'd show him who's the boss around here.
Giraffe: a very tall person
example: I'll be a giraffe in those high-heels.
Vulture: a cruel person
example: That vulture didn't listen to the convict and asked for the death sentence.
Hyena: a dishonest, cruel person
example: The robbers jumped on me, beat me and took all my money like hyenas.
Wolf: a clever person in a dishonest way
example: In this society full of wolves how can a simple man like him succeed?
Bat: sometimes referring to criminals
example: The night bats raped and murdered about 13 women in 2 years.