To Decrease Bird Kills, Cat Lovers Team Up With Bird Lovers In D.C. Cat Count

There is a long-simmering, often overheated debate among animal lovers. It pits cat lovers, who want to help feral cats survive outdoors, against bird lovers, who say cats are causing bird populations to plummet.

It's team cat vs. team bird, and it can get ugly online, with terms like "fake news" and "alternative facts" bandied about in blog posts.

But on a recent morning, members of those two opposing camps were working together, navigating a densely forested part of Rock Creek Park in Washington, D.C., by GPS.