, 86, 91, 94, 133, 138, 191;
exclamations, 44, 58, 61, 87, 115, 116, 124;
scoldings, 34, 36, 37, 58, 60, 86, 95, 96, 162, 172, 182;
songs of happiness, 8, 10, 15, 21, 22, 52, 59, 82, 83, 84, 90,
93, 95, 96, 97, 122, 126, 142, 169, 175, 178, 198, 205;
songs of love, 22, 26, 30, 31, 56, 90, 101, 142, 168, 170, 181,
204, 205, 208.
humor, 124.
individuality, 6, 8, 11, 13, 14, 16, 22, 25, 26, 30, 31, 32, 33, 34,
35, 38, 41, 42, 43, 44, 45, 46, 49, 50, 52, 54, 56, 62, 63, 64,
65, 75-80, 81, 84, 85, 86, 87, 88, 90, 91, 95, 96, 97, 98, 99,
100, 101, 111, 115, 124, 125,126, 132, 136, 139, 142, 143, 149,
153, 154, 163, 164, 170, 179, 181, 184, 190, 194, 195, 204, 205,
208, 209, 216-217.
inherited instincts, 75, 76, 78, 79, 156.
intelligence shown in,--
building, 17, 28, 49, 50, 53, 107, 108, 109, 114, 136, 150, 154,
158, 217-218;
disciplining young, 85;
getting food by others' work, 13;
profiting by mistakes, 107, 109, 133, 134, 153-154 (?);
protecting young, 8, 9, 12, 36, 37, 85, 135, 156, 191, 215;
removing nest from danger, 60, 114, 154;
selecting materials for nest, 14, 53, 56, 82, 89, 96, 107, 127,
144, 150, 179, 181;
selecting nesting site, 23, 28, 83, 93, 95, 99, 124, 127, 130,
131, 150;
silence of young in danger, 71, 85.
keen senses, 59, 74, 97.
local attachment, 6;
special perches, 57, 62, 126, 129, 167, 202, 204, 206.
play impulse, 12, 115, 124, 155 (?), 208-209.
pride of possession, 25, 86, 115, 204-205.
self-denial, 33, 50, 52.

Birds,
adaptation, 150, 152, 163, 164;
protective coloration, 10, 11, 81, 92, 101, 185, 199.
domestic life,--
accept help in building, 97, 152-153, 175-178, 179-180;
affection, 22, 27, 30, 31, 32, 33, 78, 84, 85, 90, 142, 166,
180, 182, 196, 201, 204, 208;
as parents, 7, 8, 9, 11, 12, 23, 24, 31-38, 46, 55, 63, 64,
69, 84, 85, 87, 88, 110, 111, 129, 135, 137, 154-155, 156,
172, 182, 185-186, 189-193, 215, 217;
companionship of mates, 22, 26, 27, 30, 31, 42, 46, 53, 56,
59, 62, 81, 83, 87, 89, 90, 106, 109, 126, 141, 142, 145,
166, 177, 178, 180, 182, 196, 204;
coquettish airs, 33;
courtship, 31, 90, 101, 148, 149;
defense of nest, 7, 8, 9, 11, 12, 25, 45, 46, 47, 57, 58, 86,