At a time when the world is seeing its species rapidly go extinct, the Kirtland's warbler is not just a survivor, it's a rock star. The Kirtland's warbler is the rarest warbler species in North America and will always be rare because of its persnickety nesting preferences. But when the total population fell below 400 birds in the 1970s and 1980s---driven largely by a loss of habitat and the introduction of a parasite---a small group of dedicated...
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Nature