Originally Posted by
BillyD
Yep, they do tend to bully smaller birds, who in turn hire peregrines to exact revenge. It’s rough out there.
They were talking about this. Looks like they exaggerated the prevalence.
https://www.allaboutbirds.org/guide/Blue_Jay/overview
Blue Jays are known to take and eat eggs and nestlings of other birds, but we don’t know how common this is. In an extensive study of Blue Jay feeding habits, only 1% of jays had evidence of eggs or birds in their stomachs. Most of their diet was composed of insects and nuts.