21. When were the house sparrows, or, as we call them, the English sparrows, introduced into this country? Where? Why? Have they proved a success from our standpoint? From their own? Why have they increased so enormously? What part of the country is still free from them? Why? Give the reasons for and the methods of fighting English sparrows. 22. The history of the passenger pigeon. 23. What has the quail or bobwhite to do with our food supply? 24. Poultry keeping. 25. Name three bird magazines and give a characteristic of each one. 26. Fossil birds and the light they shed on the probable ancestry of birds. Study of the Migration of Animals in General The migration of birds is only one case of a phenomenon which is comparatively common. From your text and reference books find other examples of migration. What are the causes which make animals migrate? What methods do various animals use? What are some results of these migrations? Summarize your study in the following thesis:-- _The distribution of animals._ 1. The necessity for this distribution. 2. Methods of distribution--voluntary--involuntary. _Note._--See in review the methods used to spread corals, hydroids, and other sedentary forms, starfish, clams, etc., as well as those used by the various vertebrates. 3. Time when migration occurs. Consider here the young of most animals, and the movements of many birds, as well as movements caused by some accidental occurrence. 4. Distance that animals move from the place of their birth. 5. Factors which determine the routes of distribution. 6. Factors which limit distribution. _Migration maps._ 1. A map to show the migration route of the birds of your region. 2. A map to show the migration of the potato beetle (or English sparrow or any other animal the extension of whose range has been studied). 3. A map of the world, showing the zonal areas. 4. A map of North America, showing the distribution of the ungulates, with the boundaries and barriers marked. 5. A map of North America, showing the distribution of the fur-bearing animals. 6. A map of the world, showing the distribution of the human races. #E. STUDIES OF MAMMALS# #To illustrate Man's Relation to Other Animals; the Connection between Mode of Life and Structure# The Rabbit _The effects of domestication upon an animal. A burrowing type of rodent._ _Materials._ Living rabbits--young rabbits are more desirable for laboratory study. _Observations._ _The Body._ 1. What divisions of the body are there? Compare the length and use of the neck with that of the pigeon. Describe the character and length of the tail. What use has it, if any? _Locomotion._ 2. What methods of locomotion has the rabbit? Which is most commonly used?