The Inaccessible Rail

Inaccessible Island rail (photo by Brian Gratwicke via Wikimedia Commons)

If you’ve ever gone looking for rails, you know they are usually inaccessible. They live in tall dense marsh grass and won’t come out for anything except the sound of another rail — and then only in the breeding season.

But there is in fact a truly inaccessible rail.  The Inaccessible Island rail (Atlantisia rogersi) is the smallest flightless bird in the world, extremely rare, and vulnerable to extinction.  He lives only on Inaccessible Island.

He made news in October because he cannot fly yet new DNA studies show that his ancestors, related to black rails, did fly more than 2,300 miles from South America over the South Atlantic Ocean to Inaccessible Island.  They arrived 1.5 million years ago.

This was a surprise because the island, which is in the Tristan de Cunha archipelago, is closer to Africa than to South America as shown below. (Click on the map or its caption to explore it on Google Maps.)

Location of Inaccessible Island on the globe (screenshot from Google Maps)

The island is called Inaccessible because it is.  It’s almost impossible to land on the narrow beach — most attempts fail — and the cliffs are so steep that the top is inaccessible.

Panorama of Inaccessible Island (photo from Wikimedia Commons)

The island’s walls dwarf the people exploring the beach, below. 

Inaccessible Island beach, people in the distance (photo by Brian Gratwicke via Wikimedia Commons) 

Fortunately this tour group got lucky. They were able to land and they found the rail. A member of the group, Brian Gratwicke, took these photos.

Read more about the origins of the Inaccessible Island Rail in this article from Researchgate.

(photos by Brian Gratwicke via Wikimedia Commons; map screenshot from Google maps; click on the captions to see the originals)

1 thought on “The Inaccessible Rail

  1. And odd observation. Pittsburgh’s about 40 degrees north and Inaccessible Island is about 38 degrees south. Pittsburgh’s about -80 degrees east, and Inaccessible is about +12 degrees west. Another way to see this comparison: the Southern Hemisphere has much less land mass (much less!) than the Northern Hemisphere. Inaccessible’s in the middle of a vast area of ocean. Pittsburgh’s in (well sort of near) the middle of a large continent.

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