Here is my least favorite bird, the
Brown-headed Cowbird (Molothrus ater).
According to the authoritative Cornell
Ornithology Lab, this bird accounts for
60% of the Cardinal predation. And it’s
not just Cardinals, but all other songbirds
that this species preys upon. Like Cuckoos,
Cowbirds lay their eggs in the nest of
other birds. However, while Cuckoos then
leave the nesting adult “foster parents”
to hatch and raise their young, the
Cowbirds go further. The female,
pictured on the right, waits nearby the
nest where she has laid her eggs, and when
the nesting adults leave to feed, she comes
back to the nest and destroys their eggs,
leaving only her own eggs intact. This is
the terrorist of the bird world.


