When did the Tasmanian tiger first become endangered?

The Tasmanian tiger (Thylacinus cynocephalus) became officially extinct in 1936, with the last known individual dying in captivity at the Hobart Zoo.

However, the species had been experiencing a rapid decline in population for decades prior to that, likely due to several factors including:

* Habitat loss and fragmentation: Clearing land for agriculture and settlements destroyed their natural habitats.

* Persecution by humans: The Tasmanian tiger was considered a threat to livestock, leading to widespread hunting and bounties placed on the animal.

* Disease: It's possible that diseases introduced by European settlers contributed to their decline.

Therefore, while the official extinction date is 1936, the Tasmanian tiger had been endangered for a significant period before that, likely since the 19th century.