Feathered Jekyl and Hyde?— More "Like His Dad 

 Every Day"— Tliey Are Omnivorous— Shrikes or 

 Butcher-Birds— The Northern Shrike— An Improper 

 Name— A Beneficial Species— The Loggerhead Shrike— 

 A Summer Bird Here— Feeds on Insects— Sometimes 

 Try to Kill Chicks— Northern Raven— Must Watch the 

 Fox— The Nest and Eggs— They Raise One Brood— Like 

 One Nesting Place— Left in Sorrow and Disgust— 

 "Quoth the Raven, Nevermore" — Its Distribution in 

 Pennsylvania — Common Crow — The Nest and Eggs — 

 Will Eat Eggs and Poultry— Fish Crow— Breeds Near 

 Philadelphia— Will Take Ducklings— What Audubon 

 Says of Its Food— Blue Jay— The Nest and Eggs— Suck 

 Hens' Eggs and Kill Birds— What A Massachusetts 

 Naturalist Says— Statements from Other Observ- 

 ers—Its Vegetable Food— The Shrikes— Great North- 

 ern Shrike — ^Loggerhead Shrike — The Nest, Eggs and 

 Young— They Squeak LikeMioe— Where They Watch for 

 Prey— The W^hite-rumped Shrike— Blackbirds— -Com- 

 mon Crow Blackbird-^Il^ad A Nomadic Life— The Nest 

 and Eggs— Select Different Nesting Sites— Food— They 

 Hunt Beetles and Grubs— They Eat Soraie Fruit— A 

 Thousand Stomachs Examined— They are Fond of 

 Larvae — They Catch Grasshoppers— Will Eat Wheat, 

 Oats and Corn— Will Eat Birds and Eggs— They 

 Sometimes Eat Fish— The Bronzed Blackbird— The 

 Herons and Bitterns— Great Blue Heron— The Nest and 

 Eggs— Dangerous When Wounded— Its Flesh is Quite 

 Palatable— What Nuttall Says of its Habits— Green 

 Heron— The Nest and Eggs— Eats Fish, Insects, Frogs. 

 Etc. — Stomach Examinations — Black-crowned Night 

 Herons— They Breed in Colonies— Fond of Goldfish- 

 They Subsist mainly on Fish— American Bittern— Has 

 a Loud Voice — The Nest and Eggs— Its Food, pages,.. 254-316 



CHAPTER V. 



MAMMALS. 



'New Faces Will Meet us"— Valuable Fur-Bearing 

 Species— Disturbing Nature's Balance— Great Errors- 

 Insectivorous Birds Driven Away— Has Agriculture 

 Profited?— Danger of Importing Foreign Species- 

 Some Troublesome Pests— Mother Eve and Her Suc- 

 cessors — Expert in Eluding Observation— Some are 



