This is all you need. It's a mixture of dried blood, garlic oil, and egg solids. It's absolutely putrid. I tried spraying it on our bushes to prevent deer from eating them, and it's the closest I've ever come to throwing up purely from a smell. Unfortunately, the bushes were in front of our front porch. I had to stop spraying it because it made the porch smell awful.
This happened to me last year. I left the nest as it was just on one of the back gutters but it took about a month till they hatched and left so you may want to try to move it if will end up moving.
I noticed a nest going up in the same spot a few weeks ago so I knocked it down before it was complete and found this stuff on Amazon and it's been pretty effective. Seems like it's basically just rotten eggs so non toxic to the animals as well
These little motherfuckers hurt my 2 week old babies.
I went and got some Bonide Repels-All Animal Repellent and sprayed along the fence the traverse and into the hole they dug. Shit stanks, but I haven't had any more holes in about 6-7 days. Not too sure if it's working tbh
I've always been curious of these plastic owls, but havent tried one yet. Would be next in line
Bonide (BND238) - Repels-All Ready to Use Animal Repellent (32 fl oz.) https://www.amazon.com/dp/B001E4R2SO/ref=cm_sw_r_cp_apan_glt_fabc_84J8W8QMCRCAGE82H0T7?_encoding=UTF8&psc=1