Other contributors have said "What are the habits of a Robin?" is the same question as "What are the eating habits of the North American Robin bird?" If you believe that these are not asking the same thing and should be answered differently, click here
What are the eating habits of the North American Robin bird?
The cardinal is a songbird of the fringilidae family, new world seedeaters, They are closely related to grosbeaks, in fact, the old name was cardinal grosbeak. They begin to sing in March in the...
Cardinals are essentially seedeaters which eat a lot of insects, buds, fruit/berries etc., as available. When breeding in particular they become highly insectivorous.