Cryptid odds of existence
The possibility of birds or insects or other small mammals thought
to be extinct or non existant existing today, odds wise, is pretty
good in my opinion. The thought of Bigfoot or any other large
creature existing today seems unlikely unless it's living in the
Congo region.
Most oceanic cryptids i think are more likely than land ones.
Anything dating back to the prehistoric times could easily still be
lurking in the depths of the oceans. I'll list a few cryptids and
put my percentage of possiblity of existing today after it. Feel
free to add your own:
Bigfoot: 2%
Nessie or Champ: 1%
Thunderbird: 10%
Megaladon Shark: 20%
Mokele-mbembe: 30%