Some non-venomous species would be large enough to take an egg but not a full bird.
Chicks have to be protected from raccoons, skunks (also like eggs), weasels, snakes, cats.
JYD #123 The great one formerly known as Architect.
I am now a fictional British television police officer (currently a Detective Sgt) at Thames Valley Station. My governor is Detective Inspector Fred Thursday and it’s 1969.
