There are very few wild large mammal populations which number in the 100s of thousands, let alone millions. The principle exceptions are all domesticated animals: cattle, sheep, hogs, and the like.
After humans, the largest non-domesticated predator mammal population is likely crabeater seals (11-12 million); land predator, the American black bear (850-950 thousand). There are fewer than half the California sea lions statewide (355 thousand) than there are residents of San Francisco (837 thousand). Most major land predators number in the tens of thousands worldwide, or fewer.
Among ungulates (divided amongst even and odd toed variants for some reason), water buffalo are the most numerous non-domesticated population at about 172 million, followed by species of duiker (7 & 2 million). American bison number 530,000, reduced from a pre-Columbian population of 60 million, and a low of 750 total individuals in 1890.
Of the non-domesticated odd-toed ungulates (generally: horse-like), most numerous are the plains zebra, at 660,000. The next most numerous is the Kiang, 60,000.
In the oceans, several dolphin populations number 1-2 millions.
Among primates, the most numerous non-human population is Müller's Bornean gibbon, 250-375 thousand.
That is: other than humans, most large land mammals have populations equivalent to mid-sized human towns, a few might rival mid-sized to larger cities.
And populations of dogs and cats (83.3 million and 95.6 million respectively in the US according to the Humane Society)[1] are entirely due to direct human intervention.
After humans, the largest non-domesticated predator mammal population is likely crabeater seals (11-12 million); land predator, the American black bear (850-950 thousand). There are fewer than half the California sea lions statewide (355 thousand) than there are residents of San Francisco (837 thousand). Most major land predators number in the tens of thousands worldwide, or fewer.
Among ungulates (divided amongst even and odd toed variants for some reason), water buffalo are the most numerous non-domesticated population at about 172 million, followed by species of duiker (7 & 2 million). American bison number 530,000, reduced from a pre-Columbian population of 60 million, and a low of 750 total individuals in 1890.
Of the non-domesticated odd-toed ungulates (generally: horse-like), most numerous are the plains zebra, at 660,000. The next most numerous is the Kiang, 60,000.
In the oceans, several dolphin populations number 1-2 millions.
Among primates, the most numerous non-human population is Müller's Bornean gibbon, 250-375 thousand.
That is: other than humans, most large land mammals have populations equivalent to mid-sized human towns, a few might rival mid-sized to larger cities.
And populations of dogs and cats (83.3 million and 95.6 million respectively in the US according to the Humane Society)[1] are entirely due to direct human intervention.
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Notes:
1. http://www.humanesociety.org/issues/pet_overpopulation/facts...