This section is from the book "Bird Guide: Water Birds, Game Birds And Birds Of Prey East Of The Rockies", by Chester A. Reed. Also available from Amazon: The Bird Book.
Many of the birds shown in this book are Game Birds, that is, birds that the law allows you to shoot at certain seasons of the year. Some of these are still abundant and will be for numbers of years; others are very scarce and if they are further hunted, will become entirely exterminated in two or three years. Bow-whites are very scarce in New England; Prairie Hens are becoming scarce in parts of the west; the small Curlew is practically extinct, while the larger ones are rapidly going. In behalf of all bird lovers, we ask that you refrain from killing those species that you know are rare, and use moderation in the taking of all others. We also ask that you use any influence that may be yours, to further laws prohibiting all traffic in birds. The man who makes his living shooting birds, will make more, live longer and die happier, tilling the soil than by killing God's creatures. We do not, now, ask you to refrain from hunting entirely, but get your sport at your traps. It takes more skill to break a clay pigeon than to kill a quail.

Characteristics of Form or Habit, That Will Determine to What Order or Family Birds Belong.
Grebes; Colymbidce: - Form, duck-like; bill pointed and never flattened; no tail; legs at extreme end of body; each flattened toe with an individual web; wings small. Flies rapidly, but patters along the water before taking wing. Expert divers, using wings as well as feet, to propel them, under water.
 
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