What are the idioms about animals?

Cruel and heartless, snake and scorpion heart, birds hide everything, etc.

First, brutal and cold blooded:

1.? Description: describe the heart as vicious as a wolf and a dog.

2.? From: Feng Ming Menglong's Wake Up, Volume 30: "Then I know this thief is as heartless."

3.? Example: You stinking piece of shit. You want to provoke me. You had a good time. ◎ Qing Li Garbo's "China Now" 12 back to 4. Grammar: combination; As predicate, attribute and object; With a derogatory connotation.

Second, the snake heart:

1.? Explanation: Scorpion: A poisonous spider. Describe a vicious heart.

2.? From: Yuan Anonymous's "Make-up Box" is the second fold: "It's a snake's heart, not as poisonous as a scorpion."

Third, birds try their best to hide:

1.? Explanation: Without the bird, the bow will be hidden and not used. It is a metaphor for kicking people who have made contributions away after things are successful.

2.? From: "Historical Records of the King of Yue Goujian's Family": "Birds are exhausted, and good bows are hidden; A sly rabbit dies and a running dog cooks. "

3.? Example: My younger brother called Fang La back and urged me to live in seclusion. Knowing that there is a disaster. ◎ Chen's "Water Margin" 22 times

4.? Grammar: compact; As predicate and attribute; With a derogatory meaning, it is often used with "rabbit dead dog cooking".