Index 
Land-birds, arboreal group | Osprey (Fish Hawk), 190. 
of, 76. Oven-bird, 15, 20, 25. 
terrestrial group of, 76. Oyster-catcher, 65. 
Lark, Field (European), 168. 
Meadow, 31, 274. PELICAN, QI. 
Shore (Horned), 167, 171. | Penekese Island, 122. 
Lichen, 263. Penguin, 89. 
Loon, Common, 68. Petrel, 93. 
stormy, 135. 
MARYLAND YELLOW-| Pewee, 13, 21. 
THROAT, II, 20, 25. Phalarope, 66, 84. 
Murre, 68. Phoebe, 21, 229. 
Music, of nature, Iog. Plover, Golden, 64. 
popular definition of, 111. Kildeer, 63. 
technical definition of, Io9. Piping, 63. 
Semi-palmated, 173. 
NATURAL RESEARCH, what | Plovers, 83. 
enhances interest in, 26, 
277. RAILS, 67. 
Nest-building, principles that | Redstart, 11, 20. 
govern, 144. Robin, 20, 143, 279. 
Nests, 140. 
of land-birds, 145. SANDPIPER, SPOTTED, 67. 
of water fowl, 147. Sandpipers, 23, 33, 83, 178. 
why in trees, 149. Scientific definition, inade- 
Nidification, 139. quacy of, 109. 
Nuthatch, White-breasted, ; Sea Parrot, 66. 
13, 21. Sea Swallow, r2t, 134. 
Skunk cabbage, 262. 
OAK, the, Ig. Snake-bird, oI. 
Ocean, the, 57, 163. Sparrow, Chipping, 6, 21. 
Order ofdevelopment in| Field, 4, 21. 
spring, 266. Fox, 264. 
Oriole, Baltimore, 13, 20. Song, 21, 259, 278. 
Ornithology, marine, relation| Vesper, 5. 
of moon to, 176. Spring, advent of, 253. 
285, 
