You might think that the neotropics are one big mating party, but even in places that stay green and vibrant year-round, raising chicks comes with trade-offs. Although Scarlet Macaws live in perpetually lush environments, they time their breeding to the wet season, when fruit is abundant. Photo: Barbara Baird/Audubon Photography Awards Here’s the way we’re used to thinking about bird breeding in North America: As our days get longer and temperatures rise, neotropical migrants arrive to produce and raise chicks alongside our resident bird species, taking advantage of abundant flowers, fruits, and insects. When those resources dwindle, they head back south to enjoy favorable weather and prepare for their return trip to the breeding grounds. But what about species that don’t make long-distance migrations—the ones that spend the year in perpetual warmth and twelve-hour days, always surrounded by abundance?…