Passenger Pigeon The most common bird in North America at a point of time, today the Passenger Pigeon is only found in International Union for Conservation of Nature (IUCN) extinct animals list. The Passenger Pigeons, also known as wild pigeons, were found in large migratory flocks containing millions of birds. This bird was a major source of food for the native Indians, as well as European travelers and therefore large-scale hunting was one of the most important factor which led to a drastic decline in their numbers. The first decade of 20th century was marked by rare individual sightings, before it finally became extinct after the last confirmed sighting in 1912.
Pyrenean Ibex The Pyrenean Ibex was a subspecies of the Spanish Ibex, found in abundance in the Pyrenees mountain range between France and Spain. Inability to compete with other species in the region and extensive poaching led to depletion of Pyrenean Ibex population to a great extent, with less than 100 individuals surviving by 1900 and eventually less than 40 in 1910. Various conservation measures ensured that the animal lived for another few decades, but the population remained negligible throughout the century, before finally getting extinct in 2000, when the last living individual of this species got crushed beneath a falling tree. An attempt to clone Pyrenean Ibex seemed successful with a young one being born in January 2009, but died within a few hours of its birth due to lung failure.
