1New Guinea Highland Wild Dogs (New Guinea)
After spotting canine paw prints in the mud during a 2016 expedition, researchers set up trail cameras and bait throughout the region and within just a few days, at least 15 individuals— including a pregnant female and pups—showed up.
For more than 50 years, scientists have been unable to confirm the dogs' existence, causing many to fear they'd gone extinct. They are said to be the "rarest, most ancient canid" in the world today. (Source)
2Tasmanian Tiger (Australia)
The animal isn't a tiger, and—despite looking very much like a species of dog—isn't of canine lineage either, but is a carnivorous marsupial. Australians have occasionally claimed to have seen the legendary animal over the years, but sightings were typically rare and were later attributed to nothing more than misidentification. Today, however, "plausible sightings" are beginning to give life to the theory that the animal never actually went extinct at all.
Now, Queensland, Australia scientists are jumping on the bandwagon. They plan to set up cameras in areas where reported sightings have taken place in hopes of confirming the claims. (Source)
3Red-Faced Liocichla (Nepal)
The bird-watching group originally saw only two red-faced liocichlas, but when they returned the next day, they saw eight birds, including a male-female pair. (Source)
4Spotted Tree Frog (Australia)
The last remaining frogs were removed from Kosciuszko in 2001 and bred in captivity before being released back into the wild, but the first attempt re-establish them failed when they were again wiped out by the fungus. Three years ago, they were relocated to a new, very remote site that they had never previously inhabited and now appear to be thriving! (Source)
5Sockeye Salmon (New Zealand)
There are believed to be about 1000 spawning fish in just one of Lake Pukaki's tributary streams this year, so go check 'em out, but don't interrupt them—they are protected under New Zealand's Conservation Act. (Source)
6Little Brown Bats (USA)
In years past, while in hibernation, a fungus silently attached itself to the bats, sapping them of their strength, wounding their wings and causing the mammals to wake from their winter torpor, only to die of starvation, thirst or exhaustion. The fungus grew around their noses and mouths and on their wings and came to be known as "white-nose syndrome."
Over the next few years, 90% or more of the little brown bats succumbed to white-nose. Today, less than 10 percent of the population remains, but "the survival rate is back to normal," according to MacKenzie Hall, the wildlife biologist who heads the Division of Fish and Wildlife's bat program. She also said, however, "It could be 30, 40 years before the population is back to where it was before white-nose." (Source)
7Chinese River Dolphin (China)
The baiji, or "goddess of the Yangtze," was a species of white river dolphin that was abundant for around 20 million years before it was wiped out by hunting and pollution. Back in the 1950s, there were thousands of baijis living in the Yangtze, Asia's longest river. But during the Great Famine, millions of starving Chinese people under Mao Zedong's rule resorted to eating the species in order to survive. (Source)
The Iowa Department of Natural Resources says a trail camera photo has confirmed the fisher's presence. Officials believe this one hails from from southeast Minnesota.
The fisher is a carnivore and has few predators, outside of humans. If you come across one, do yourself a favor and keep your distance—they can be pretty fierce. (Source)
9Indochinese Tigers (Thailand)
After poaching and loss of habitat obliterated the tigers' population to less than 250 (a century ago, there were about 100,000 individuals roaming in the wild), scientists only knew of one other small breeding population before this discovery. Conservationists credit the country's improved anti-poaching efforts for the achievement. (Source)
10Beer Slug (Germany)
The creature, found in moist basements where beer was brewed, was last spotted in 1935 and experts believed the species had become extinct. It was commonly found in the 19th-century, but numbers started to decline due to the destruction of Hamburg's more unhygienic brewing spots. (Source)