[0x0203]

Another fun bird fact about bluejays and crows: listening for a bunch of screaming crows and/or jays is a good way of finding owls, as they both seem to have an inherent hatred of owls, and harass them whenever given a chance. In my area, the poor owls rarely seem to get any rest from being swooped and yelled at all day.

[__turbobrew__]

We have a big ponderosa pine on our property and sometimes the stellar jays go wild when there is a bird of prey up there.

We have seen barred owls, great horned owls, and cooper’s hawks.

https://imgur.com/a/ymDn7ff

[morkalork]

I haven't seen this with owls but we've got some kind small predator bird like a peregrine falcon that the blue jays have it absolutely out for. The most interesting thing is once they start making the alerting calls, an inter-species mob will form with other birds of similar sized that aren't usually aggressive (like northern flickers) and they'll all harass the falcon until it flies off.

[HelloMcFly]

It's called mobbing!

[e40]

In my area the yelling is always about hawks. The owls here are nocturnal so they don’t overlap.