Acanthis linaria, 146. 
Accipiter cooperi, 107. 
velox, 107. 
Actitis macularia, 96. 
gialitis »emipalmata, 99. 
vociferu, 109, 
Agelaius pheniceus, 132. 
Aggressive coloration, 44. 
Aigrette plumes, 28. 
Alaudide, 126. 
Albatross, 18, 19. 
Alcedinida, 113. 
Ampelida, 161. 
Ampelis cedroram, 161. 
Anatida, 89. 
Antrostomus vociferns, 119. 
Archmopteryx, 3, 4, 18. 
Ardea herodiaa, 91. 
virescens, 92. 
Ardeida, 90, 
Asio accipitrinas, 109. 
wilsonianus, 110. 
Auk, Great, 20. 
Razor-billed, 20. 
Auks, 20, 21, 28, 30. 
Avocet, 32, 33, 
Avocettula, 31. 
Bill, the, as a hand, 30. 
as a musical instrument, 30. 
a4 & Weapon, 31. 
sexual adornment of, 30. 
uses of, 30. 
INDEX. 
Birds, altricial, 69, 
biography of, 73, 
characters of, 2. 
colors of, 35, 
distribution of, 4. 
economic value of, 5, 
eggs of, 68. ~ 
evolution of, 14. 
feet of, 27. 
field key to, 75. 
flightless, 19. 
grace of, 10. 
how to identify, 71. 
mating of, 65. 
mental development of, 10, 
migration of, 48. 
musical powers of, 10. 
neats of, 65. 
number of species of, 1. 
place in Nature of, 1. 
precocial, 69. 
relation to man of, 5. 
scientific value of, 5. 
songs of, 11, 62. 
tail of, 25, 
topography of, 74. 
voice of, 42. 
wings of. 17. 
young of, 70, 
Bittern. American, 93. 
Blackbird, Crow, 133.- 
Redwinged, 132. ~ 
Blackbirds, 55, 180. — 
