nature

One of the most spectacular wildlife displays on the planet is happening in the skies over Costa Rica’s Caribbean coast right now: fall raptor migration and the formation of a "river of raptors." And thanks to a geographic bottleneck, one of the best places in the world to witness it is the Kèköldi indigenous territory on Costa Rica's southern Caribbean coast.

As rising temperatures cause flower populations to decline, bumblebees' tongues are getting shorter in an apparent trend away from specialization. Scientists believe that having shorter tongues allows the bees to be more generalized when it comes to the flowers they visit, giving them a wider range of food sources to choose from.

Continuing last month's series, a look at five more birds that are common in the trees, telephone wires, rooftops, and sidewalks of San José.

Despite the best efforts of many a telescope-wielding nature guide, I fell in love with birds while sitting at my desk in San José,...

Here’s something you don’t see every day — a two-toed sloth getting its toenails painted blue. “We paint them so we can recognize them...

Many people know that honeybees are vanishing. They bring this up in conversation in the tone of an urban legend: Have you heard about...

In one INBio classroom, I surveyed the jars of specimens – pickled frogs and insects – that lined the walls. Giant moths shared table space with a spider under glass. Seeing them arranged together, I can get choked up over the range of nature’s expression.

One of our readers, The Drone Master, sent us this video. It offers a gorgeous glimpse of Costa Rica from above - but not...

Whether they’re called “sloths” or “osos perezosos” (“lazy bears”), these slow-moving mammals have never earned a flattering name. But sloths are unperturbed by pretty...

Photos from Nature Air's new flight to Limón.