While our mountain retreat offers breathtaking views of Costa Rica’s lush rainforests, a different kind of avian wonder exists out at sea. Today, we set our sights on the Short-tailed Shearwater, a migratory marvel that graces the Pacific waters surrounding Costa Rica during specific times of the year.
A Champion Traveler:
The Short-tailed Shearwater holds the title of the most abundant seabird species in Australian waters. But its true claim to fame is its incredible migratory journey. Imagine this: Twice a year, these tireless birds embark on a round trip of roughly 15,000 kilometers (9,300 miles)!
Breeding Down Under:
Their breeding grounds lie primarily on islands off southern Australia, where they take advantage of the cool waters and plentiful food sources during the southern hemisphere’s summer. Here, they raise their chicks in burrows dug into soft soil.
Venturing North:
Come the northern hemisphere’s summer, the Short-tailed Shearwater undergoes a complete shift. They transform into long-distance adventurers, departing their breeding grounds and setting a course towards the north Pacific.
A Glimpse in Costa Rica:
These remarkable birds can be spotted off the coast of Costa Rica during this northward migration, typically from October to January, and again in May. Keep your eyes peeled for dark, narrow-winged silhouettes gliding effortlessly over the waves, their crooked wings beating in a quick, snappy rhythm.
Masters of the Open Ocean:
Short-tailed Shearwaters are perfectly adapted for their oceanic lifestyle. Their streamlined bodies and long wings allow for efficient flight, while their strong legs propel them underwater in pursuit of prey. Keen eyesight helps them spot small fish, squid, and crustaceans near the surface, while a special gland excretes a salty oil that acts as a defense mechanism against predators.
Look for the Subtle Differences:
Telling a Short-tailed Shearwater apart from its close relative, the Sooty Shearwater, can be tricky. Both share a dark brown plumage. However, the Short-tailed Shearwater tends to be slightly lighter in color and has more noticeably crooked wings. Additionally, their bills are shorter and their heads appear rounder.
A Global Citizen:
The Short-tailed Shearwater’s remarkable journey connects continents and ecosystems. While their breeding grounds lie far south, their presence in Costa Rican waters during specific seasons adds another layer of wonder to the country’s rich biodiversity.
Listen to the Call of the Wild:
Next time you visit our mountain retreat, take a detour to the Pacific Coast. With a bit of luck, you might just witness the awe-inspiring spectacle of the Short-tailed Shearwater, a testament to the enduring power of nature and the boundless spirit of exploration in the animal kingdom.
For more information, please view our comprehensive guide about the birds of Costa Rica
