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[13] [14] There are claims of São Francisco piranhas at up to 60 cm (24 in), but the largest confirmed specimens are considerably smaller. [15] The extinct Megapiranha which lived 8–10 million years ago reached about 71 cm (28 in) long, [ 16 ] and possibly even 128 cm (50 in).
In addition to these, there are about 490 golden lion tamarins in 150 zoos around the world. [40] Lion-tailed macaque: Macaca silenus: 4,000 [41] EN [41] [41] Estimate is a maximum. [41] Silvery gibbon: Hylobates moloch: 4,000–4,500 [42] EN [42] [42] Gee's golden langur: Trachypithecus geei: 6,000–6,500 [43] EN [43] [43] Estimate is for ...
Recent figures indicate that there are more than 1.4 billion insects for each human on the planet, [27] or roughly 10 19 (10 quintillion) individual living insects on the earth at any given time. [28] An article in The New York Times claimed that the world holds 300 pounds of insects for every pound of humans. [28]
The Javan rhino (Rhinoceros sondaicus) once roamed across many countries in Southeast Asia. Around 2,000 years ago, they were still common in many parts of China. Around 12,000 years ago, they ...
Exact population counts are difficult to ascertain, but the World Wildlife Fund estimates there are only 120,000 orangutans left in the wild across all species. They have a low reproductive rate ...
According to the U.N. World Health Organization, there were an estimated 597,000 malaria deaths worldwide in 2023. Chimpanzees, and the closely related bonobos, are the species nearest genetically ...
This is a collection of lists of mammal species by the estimated global population, divided by orders.Lists only exist for some orders; for example, the most diverse order - rodents - is missing.
Red-bellied piranhas often travel in shoals as a predatory defense, as well as for the offense. In studies that tested the piranhas' reactions to a simulated predator attack, resting opercular rates returned to normal more quickly among piranhas that were in shoals of eight rather than in shoals of two. Although it has been presumed that ...