The Australian Bassian thrush farts in order to startle earthworms into moving. Once on the move, the birds are able to locate and eat them. – WTF Fun Facts
Source: Bird Facts That Sound Fake but Are True (insider.com)
WTF Fun Fact – Bassian Thrush Farts While Foraging
Eating as a result of farting
Vs
Farting as a result of eating.