Peanut butter kills birds

[snopes]

Comment: Remember making peanut butter pine cone birdfeeders as a kid? I just made
some with my sons, then started running across Internet claims that the
peanut butter sticks birds' beaks together or that it otherwise can't be
digested by the birds and kills them.

[GenYus234]

The Audubon Society says that neither peanut butter, nor uncooked rice are harmful to birds.

[Bettie Page Turner]

Patently false, as evidenced by the multitude of birds eating my homemade suet each winter.

Bettie "My suet brings all the birds to the yard" Page Turner

[Avril]

Having seen parrots gleefully eat peanut butter, I know they've lived to tell the story later.

[Lainie]

Any peanut butter sticky enough to seal birds' beaks would surely be inedible by humans. It's peanut butter, not concrete or superglue.

[Apollonia]

Most wild bird feeding information sites stress the importance of only putting out peanuts designated as bird food (and from reputable sources) as natural toxins in some peanuts can kill garden birds, and that salted, dry roasted etc are for people consumption only. So if salted, roasted peanuts can kill maybe these people are assuming that peanut butter will kill birds as it is made for human use.

Also worth noting: I had a bag of mixed bird food from the RSPB which warned against whole peanuts during the breeding season as fledglings can choke on them. Crushed or grated peanuts are fine.