In our subdivision most sections of 2-3 houses in a row have either mockers or blue jays resident, but not both. During nesting season, the mockers chase all the other birds away a couple times a day, as well as harassing the people and the cats!
This appears to be a takeover attempt by the jays, but it’s too early to see whether it’s just the food access - of which we have plenty for all! - or whether they’ll try to nest.
Nature, you know? Always something new!
The mockers in Henderson were horribly territorial and it was common to see people with umbrellas when they went outside, because the mocker would dive-bomb them. Nasty little critters! And there wee so many of them!
And as my mother would say, “Nature! Ain’t it GRAND?”