Now is a good time to see the nests clearly, before the leaves begin appearing and while the birds are competing for the best nests.
(Now; is; a good time to see the nests clearly; T:before the leaves begin appearing) (the leaves; begin; ) (the leaves; appearing; ) (the birds; are competing; for the best nests)
Now the leaves the leaves the birds
is begin appearing are competing
a good time to see the nests clearly T:before the leaves begin appearing
for the best nests