tn The clause begins with the preterite and the vav (ו) consecutive; it is here subordinated to the next clause as a temporal clause.
tn Heb “and Aaron threw.”
tn The noun used here is תַּנִּין (tannin), and not the word for “serpent” or “snake” used in chap. 4. This noun refers to a large reptile, in some texts large river or sea creatures (Gen 1:21; Ps 74:13) or land creatures (Deut 32:33). This wonder paralleled Moses’ miracle in 4:3 when he cast his staff down. But this is Aaron’s staff, and a different miracle. The noun could still be rendered “snake” here since the term could be broad enough to include it.