"Yes, Dodo, they belong to another class of birds--a lower order that seem made for food--not singing nor helping the farmers; but even these should not be shot needlessly or in their nesting season. But the higher order--the perching Song Birds--should never be shot, except the common Sparrow of Europe that we call the English Sparrow. His habits are wholly bad; he meddles with the nests of useful birds and is a nuisance to his human as well as bird neighbors. "To prevent confusion Heart of Nature has divided the habits and appetites of Birdland, so that instead of a great many families all building in one kind of tree, or eating the same sort of insects or seeds, each has its own manners and customs. Thus they divide among themselves the realms of the air, the water, the trees, and the ground. Some birds, as the Swallows and Flycatchers, skim through the air to catch winged insects. Others, like the Woodpeckers and Warblers, take the scaly insects from the bark of trees. Others that walk on the ground, like the Robin, the Thrush, Meadowlark, Crow, and Red-winged Blackbird, eat ground things, such as the fat cutworms which mow with sharp jaws the young plants of corn, cabbage, and onions." "Please, Doctor Hunter," asked Rap, "I thought Crows and Blackbirds were wicked birds that ate up grain and corn, for the miller always puts up scarecrows to keep them away." But before the Doctor could answer the children caught sight of Mammy Bun coming down from the house carrying a tray. Upon this was a pitcher, some glasses, and a plate full of cakes, which, when she came under the tree, they saw were delicious-looking buns, as light and brown as good yeast and careful baking could make them. "Ah, mammy, mammy," cried Olive, Dodo, and Nat together, "how did you know that we should be hungry now, and we are simply famishing?" "Well, honeys, I jess guessed it, I reck'n. I know'd massa was a-learnin' you'uns suffin', and it allers 'peared to me that learnin' was mighty empty work. I know'd Massa Doctor was never a one to keep his patients holler, and least his own folks!" Mammy gave a big comfortable laugh as the Doctor took the tray from her hands and the children thanked her heartily, while little Rap smiled hopefully on seeing that there were six buns on the plate--that meant one for each and two for the Doctor, he thought. "No one can make such buns as mammy," said Olive, old as she was breaking hers in half, to find the lump of sugar soaked with lemon juice that she knew was inside. "She used to make them for me when I was a little girl; that is why I named her Mammy Bun, and we've called her that ever since." "I thought it was a funny name," said Rap. "One for each of us, and one for the dish," said Olive, passing the plate around. "One for the dish? What do you mean?" said Dodo.