1)
Why does it say "v'Hem l'Damam Ye'erovu"?
1.
Rashi: The trappers ambush for the birds' blood (Malbim - to kill them). R. Yonah - the birds do not realize this.
2.
R. Yonah (19): The Resha'im who ambush [to kill] the innocent, they ambush their own blood (cause their own death).
2)
What is the meaning of "Yitzpenu l'Nafshosam"?
1.
R. Yonah: Living beings are called Nefesh - "Nefesh ha'Chayah ha'Romeses" (Bereishis 1:21).
2.
Malbim: [Or, the trappers] hide in order to seize the birds alive.
