I will begin by listing the first one and then hopefully from there others will contribute different ones until we have a substantial list made.
Unclean Animals:
Acts 10:9 ¶On the morrow, as they went on their journey, and drew nigh unto the city, Peter went up upon the housetop to pray about the sixth hour:
10 And he became very hungry, and would have eaten: but while they made ready, he fell into a trance,
11 And saw heaven opened, and a certain vessel descending unto him, as it had been a great sheet knit at the four corners, and let down to the earth:
12 Wherein were all manner of fourfooted beasts of the earth, and wild beasts, and creeping things, and fowls of the air.
13 And there came a voice to him, Rise, Peter; kill, and eat.
14 But Peter said, Not so, Lord; for I have never eaten any thing that is common or unclean.
15 And the voice spake unto him again the second time, What God hath cleansed, that call not thou common.
16 This was done thrice: and the vessel was received up again into heaven.
Acts 10:19 ¶While Peter thought on the vision, the Spirit said unto him, Behold, three men seek thee.
20 Arise therefore, and get thee down, and go with them, doubting nothing: for I have sent them.
The three men were Gentiles, one whose name was Cornelius, and here as follows is the key thing that Peter said to them that tells us the meaning of the unclean animal's under that Old Law:
Acts 10:26 But Peter took him up, saying, Stand up; I myself also am a man.
27 And as he talked with him, he went in, and found many that were come together.
28 And he said unto them, Ye know how that it is an unlawful thing for a man that is a Jew to keep company, or come unto one of another nation; but God hath shewed me that I should not call any man common or unclean.
So there we see that the unclean animals under the Law were evidently considered by Peter to represent the uncleanness in men. After all, Peter having thought about the vision he was given, this was the conclusion he reached as to its meaning.
That well explains why men and nations were so often pictured as various kinds of beasts in the OT.
Unclean Animals:
Acts 10:9 ¶On the morrow, as they went on their journey, and drew nigh unto the city, Peter went up upon the housetop to pray about the sixth hour:
10 And he became very hungry, and would have eaten: but while they made ready, he fell into a trance,
11 And saw heaven opened, and a certain vessel descending unto him, as it had been a great sheet knit at the four corners, and let down to the earth:
12 Wherein were all manner of fourfooted beasts of the earth, and wild beasts, and creeping things, and fowls of the air.
13 And there came a voice to him, Rise, Peter; kill, and eat.
14 But Peter said, Not so, Lord; for I have never eaten any thing that is common or unclean.
15 And the voice spake unto him again the second time, What God hath cleansed, that call not thou common.
16 This was done thrice: and the vessel was received up again into heaven.
Acts 10:19 ¶While Peter thought on the vision, the Spirit said unto him, Behold, three men seek thee.
20 Arise therefore, and get thee down, and go with them, doubting nothing: for I have sent them.
The three men were Gentiles, one whose name was Cornelius, and here as follows is the key thing that Peter said to them that tells us the meaning of the unclean animal's under that Old Law:
Acts 10:26 But Peter took him up, saying, Stand up; I myself also am a man.
27 And as he talked with him, he went in, and found many that were come together.
28 And he said unto them, Ye know how that it is an unlawful thing for a man that is a Jew to keep company, or come unto one of another nation; but God hath shewed me that I should not call any man common or unclean.
So there we see that the unclean animals under the Law were evidently considered by Peter to represent the uncleanness in men. After all, Peter having thought about the vision he was given, this was the conclusion he reached as to its meaning.
That well explains why men and nations were so often pictured as various kinds of beasts in the OT.