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All tagged sturgeon
The IUCN’s announcement last month that the Chinese paddlefish is officially extinct was really a formality. This species of sturgeon, one of the world’s largest freshwater fish, checked out sometime between 2005 and 2010. It was already considered “functionally extinct” in 1993 when a tiny remaining population could no longer sustain itself.
The iconic migratory monarch butterfly is now, officially, “endangered,” according to the IUCN, which this week entered Danaus plexippus plexippus into its Red List of Threatened Species. The colorful flyer, known for its annual 2500-mile migration across the Americas, is being pushed to the brink of extinction by the twin forces of habitat loss and climate change.
