The turkey vulture is reported to be immune to the toxin. The degree to which other predatory birds might have immunity has not been well documented. However, it is known that some raptors, such as the Peregrine Falcon, are adversely affected from eating toxin-laden prey. Back to Questions List 5. Other than the turkey vulture, there are no other birds known to have immunity to botulism.
Birds can recover from botulism poisoning under favourable environmental conditions.
However, those birds that have recovered from sublethal doses of the toxin have not shown increased tolerance to the poison. Back to Questions List 6. Incidents at other times of the year do occur and are believed to be the result of ingestion of preformed toxin. Back to Questions List 7. There is no telltale histological damage associated with mortality due to avian botulism intoxication.