Escaped pet birds teach wild birds English
Jaynia Sladek, an ornithologist from the Australian Museum, says that some birds are just natural mimickers, able to acquire new sounds based on things they hear around them. For birds kept as pets, these sounds tend to mirror human language -- but that influence doesn't cease even after said birds escape or are released back into the wild.
Once back in their natural environments, these chatty ex-pets eventually join with wild birds who, in turn, start picking up the new words and sounds. The remnants of that language also eventually gets passed along to the escaped birds' offspring, much like it does for humans.
"There's no reason why, if one comes into the flock with words, [then] another member of the flock wouldn't pick it up as well," Sladek said in an interview with Australian Geographic.
According to the report, 'Hello cockie' is one of the most commonly heard phrases feral birds are teaching in the wild, along with a host of expletives -- perhaps the last words those escapees heard after their frantic owners realized they were making a break for freedom.