Looking for a fic - Crow Animagus Barty spies on Potters+Reg+Evan

Genuinely I do not remember like ANY of the jegulus in it, but barty turns into a crow and spies on the potters who are housing regulus AND evan and his sister

Also barty had like a nest or smt in the trees and was watching them to keep them safe. And Evan was a dog animagus and would hang out with sirius and stuff I think

evan and his sister are from like an abusive household and have very fight/flight instincts and both know how to fight and stuff because they were trained

idk please help me find it 🥹