The Purple Martin is the largest swallow that nests in the US and Canada. During fall, Purple Martins from western North America migrate to a distinct wintering area in southeastern Brazil — a travel distance of more than 5,000 miles! Scientists believe that Purple Martins started out as a South American swallow species. Over time, they evolved a seasonal migration to North America because the longer days of summer sunlight provided extra hunting and feeding opportunities during nesting season.

Listen to this episode in Spanish here.

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Imagine a pigeon the size of a Turkey Vulture or a Canada Goose! Meet the crowned-pigeon. Four species inhabit the large, equatorial island of New Guinea and a few smaller islands. Crowned-pigeons are forest birds and fruit-eaters, with iridescent purple chests and spectacular, tall, lacy crests.

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To figure out the source of a hummingbird’s hum, scientists built a special rig to measure air pressure, twelve high-speed cameras, and over 2,000 microphones to observe hummingbirds fluttering in place at an artificial flower. The researchers found that the hum derives from the difference in air pressure between the top and bottom of the wings, which alternates forty times a second as the hummingbird flaps. The rapidly shifting air pressure produces a harmonic set of sounds, from low to high, creating that iconic, musical hum.

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Some migratory songbirds such as European Robins have special light-sensitive proteins called cryptochromes in their eyes. New research suggests how the cryptochromes could alter their behavior in the presence of magnetic fields, giving birds a visual cue for north and south. Other birds can navigate with the help of a mineral called magnetite in their beaks.

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For many, birding is about more than just a love and appreciation for birds – it also helps build community. But finding a birding group in a community where the primary language is not your own can be near impossible.

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There’s a bird in Cuba with plumage in blue, red and white — the same colors as the nation’s flag. The Tocororo, or Cuban Trogon, is the national bird of Cuba. When the Tocororo is kept in a cage, they often die. This fact has become a metaphor of freedom embraced by Cubans. The Cuban Trogon is a medium-sized bird often found in pairs. Its song sounds like its Spanish name, “Tocororo.” While el Tocororo is currently abundant, its population is declining due to loss of habitat.

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When a Northern Saw-whet Owl spreads its wings, many birds can see something our human eyes can’t: the owl’s flight feathers glow with ultraviolet light. It’s invisible to humans without the help of a UV blacklight. While the glowing feathers on parrots might help them attract mates, the reason for the owls’ glowing feathers still isn’t clear. However, scientists realized that they could estimate an owl’s age based on the pattern of luminescent color on the wings, which changes predictably as birds grow and replace their feathers.

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Compared to many birds, Great Horned Owls remain with their parents a long time. They hatched in early March, from eggs laid in late January. By April, both parents were hunting through the night to feed their young. But for the last two weeks, the adults have not fed the young. The owlets have learned the skills they need to hunt for themselves. And any night now, the young owls will strike out on their own.

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