Is a ladybug greedy

Answer 1

Yes and no. Generally, in nature, predators such as ladybugs [Coccinellidae family] eat enough for their needs and the needs of others of their kind. It's a balance that's worked out between what eats and what's eaten.

Generally also, that balance is changed when non native predators are introduced. An example are Asian or Japanese ladybird beetles [Harmonia axyridis]. In their native environment, they respect a balance so that everybody gets fed. But in the United States of America, they don't say 'no' to any food source and even include native ladybugs on their food list.