Correct me if I am wrong but I believe the answer you are looking for is c
The burning of his hand effecting the nerves in his hand and rapidly sending blood to the point if contact
Supports separate species--
Big Birds have their own unique call.There is no gene flow in or out of the Big Bird population.Big Bird males hold territories in and around territories of other species but breed only with Big Bird females.
Refutes separate species--
Big Bird males can breed with G. fortis females.