Chapter 05 of 5
A Fortress of Biodiversity
Endemic life and the island as a biological laboratory.
- Evolutionary Anchor
The Sanctuary of Distance
Tristan da Cunha's extreme isolation acts as a biological time capsule. Species here have evolved in total independence from mainland predators.
- Avian Record
The World's Smallest Flightless Bird
The Inaccessible Island Rail lives only on a single neighbor island. It is the smallest bird on Earth that has lost the ability to fly.
- Genetic Divergence
Losing the Need for Flight
Without land mammals to hunt them, many Tristan birds evolved to be ground-dwellers. Flight is an energy-intensive trait that isolation rendered unnecessary.
17 more cards in this chapter
Could you answer this?
Which unique evolutionary trait is found in the Inaccessible Island Rail?
🌋 The World's Loneliest Island: Tristan da Cunha
- 01A Speck in the South AtlanticLocating the world's most isolated inhabited archipelago.
- 02Edinburgh of the Seven SeasMapping the layout and strategic site of the main settlement.
- 03The Volcano's DisplacementThe 1961 eruption and the geography of a forced exodus.
- 04Navigating the Roaring FortiesThe logistical isolation of a landmass without an airport.
- 05A Fortress of BiodiversityEndemic life and the island as a biological laboratory.