For the birds...

Wednesday's brain bender....

What two words formed from different arrangements of the same six letters, can be used to complete the sentence below?

The Bird-watchers were so interested in the new ________ that had chosen to nest nearby that it was necessary to put up a ________ around the area to protect the bird.

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As always, answers to follow later in the comments. And in keeping with the "bird" theme today, I am off to go boil three dozen eggs!

Update: Today's winner of the official smartypants sticker is friend and reader Rich Blank! Whoohoo! :-)