Also depends on how big the bird is.
Long time ago,on a 737-200,as we were at Vr,a stork came leisurely flapping smack into the right engine.
Made an absolute mess of the JT8-200 and we had to land back,single engine,overweight after the quickest 1500 ft circuit I have ever managed to execute.
What the book doesn't tell you,though is that fumes from the feather/flesh/entrails/kerosene mix eventually got to get into the a/c system and all 135 elderly hadj passengers,and the cabin crew were sick.In the flight deck we had to don the O2 masks...
We exited via the escape rope from the cockpit windows,so bad the stench in the cabin was...
Took a week to clean that airplane.