I have heard about some birds kicking one of the previous eggs out, then laying their own, and when it hatches it kicks the other birds out.
(I; have heard; about some birds) (some birds; kicking then; one of the previous eggs) (it; hatches; ) (it; kicks out; T:when it hatches)
I some birds it it
have heard kicking then hatches kicks out
about some birds
one of the previous eggs
T:when it hatches