Avarice.
The toad feeds on earth and always remains lean; because it never eats enough:— it is so afraid lest it should want for earth.
1224.
Ingratitude.
Pigeons are a symbol of ingratitude; for when they are old enough no longer to need to be fed, they begin to fight with their father, and this struggle does not end until the young one drives the father out and takes the hen and makes her his own.