A field game for Mexico's birds
Match each bird to its name before the clock runs out. The map widens as you go: the home coast, then Guerrero and its sierra, then all of southern Mexico. Every bird was photographed in the field by William Mertz.
It's free to play. If you enjoy it and want to throw a few pesos toward more photography and more birds, there's a donate button waiting at the finish line of every round.