Albert Barnes Commentary Jeremiah 5:6

"Wherefore a lion out of the forest shall slay them, a wolf of the evenings shall destroy them, a leopard shall watch against their cities; every one that goeth out thence shall be torn in pieces; because their transgressions are many, [and] their backslidings are increased." — Jeremiah 5:6 (ASV)

Evenings - See the margin. From its habit of skulking about in the twilight, the wolf is often called the “evening wolf” (Habakkuk 1:8; Zephaniah 3:3), but the word used here means a sandy desert.

Leopard - panther.