Paul gets Alex to spell it out
Here's a brief description of the contestant's attempt. Someone's probably working writing up more detail!
Paul found out Alex was dressed as an animal and a bird, getting Alex to spell out the species of bird by going through the alphabet and getting Alex to respond with 'yes' or 'no'. He correctly guessed Alex was dressed as a parrot in 8 minutes and 36 seconds.
(Written by Taskmaster Wiki contributors)