They don’t know for 100% certain but they’re pretty close to being sure
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Anonymous3d
Bc they look in the place they’re supposed to habitat in and if they’re not there it’s rare they would be somewhere else that’s not meant for them to be
1
🧲
Anonymouslightbluehater3d
They have un-extincted animals before
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Anonymouslightbluehater3d
To add to this, theres also functional extinction where the known population is so small and repopulation too slow that it is very improbable they will recover without some hidden enclave that isnt known. This was the case for a long time with the eastern white rhino