Does Hunter Owl power itself up, so when summoned it is 1500atk?

Harpies Hunting Ground is active, i summon a Harpie Lady #1, but there are no spells/traps on the field, only Hunting Ground. It the effect compulsory? or optional?

1.) Yes, Hunter Owl counts itself for its own effect, since it is a WIND Attribute monster on your side of the field.

2.) The Spell/Trap destruction of Hunting Ground is mandatory. If it is the only Spell/Trap on the field, you MUST select Hunting Ground as the target.