Can cuckoo eat vegetables?

Rhododendron does not eat vegetables.This kind of bird mainly pretends insects in the wild. If it is artificially raised, you can choose powder. Vegetables can be mixed in it, but you cannot feed it alone because it does not eat it.The main ingredients of the powder are bean flour or corn flour, but also fish powder, cooked eggs, etc. Vegetables are not necessary, but adding some can supplement cellulose, which can help it excrete.