[cobirds] Question about raptors and Collared Doves

We own two acres of mostly prairie (unfortunately planted in Smooth Brome), south and west of the little village of Hygiene.  We are constantly finding piles of Collared Dove feathers indicating a kill site 

Are these invaders aiding the success of our indigenous raptors?  With their plump size, they make a fine meal and one that seems a bit easier to catch than other species.

Pam

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