Illustrations xv 



PAGE 



FIG. 115. Female Brown Thrush placing food well down in the 



throat. Point of bill is on level with external ear of 



young . .-, . .-.-.. . . . . . 185 



FIG. 1 1 6. Kingbird helping a robust grampus down the throat of 



one of its young ... . . . . .186 



FIG. 117. The male grampus, Corydalus cornutus. Full size, from 



life 187 



FIG. 1 1 8. The male Chestnut-sided Warbler brings food to his 



mate, who passes it on to the children . . .190 

 FIG. 119. The Flicker removes packages of extraordinary size 



from its nest . ..... . . . 191 



FIG. 120. The Brown Thrush engaged in house-cleaning . . 192 

 FIG. 121. Typical reflex response of the altricial bird. Young 



Cedar Waxwing. Life-size . . . . .199 

 FIG. 122. Red-shouldered Hawk standing with the shank of one 



foot resting on the perch ... . . . ' . 200 



FIG. 123. Young Red-shouldered Hawk in the instinctive attitude 



of spreading wings and tail around the prey . .202 

 FIG. 124. Cock Robin with bill loaded aiming at a yellow target . 204 

 FIG. 125. Mother Robin standing at inspection .... 205 

 FIG. 126. Male Redwing Blackbird cleaning the nest . . . 208 

 FIG. 127. Similar pose of the same bird engaged in the same act, 



illustrating the force of habit ..... 209 

 FIG. 128. Female Kingbird balancing with raised wings while 



serving food . . . . . . . .210 



FIG. 129. The young Kingbirds struggle with a large harvest-fly, 



which the male has delivered . . . . .211 



Hatful of young Kingfishers . . . . . .213 



FIG. 130. Brown Thrush at nest in attitude expressive of fear . 215 

 FIG. 131. Young Kingfishers, twenty-four days old, shortly before 



the development of fear . . -. . . .217 

 FIG. 132. Red-tailed Hawk worried. Instinctive attitude expres- 

 sive of fear, and serving to inspire fear . . 218 

 FIG. 133. Young Cowbird standing at nest of Magnolia Warblers, 



its foster parents . . . . . . .220 



FIG. 134. Young Cowbird, as it appeared when found, completely 



filling the nest . ... .221 



FIG. 135. Young Cowbird attended by its nurse, a Chipping 



Sparrow . . . . . . . . .222 



FIG. 136. Male Robin startled by alarm call of his mate . . 223 

 FIG. 137. Male Flicker beginning to regurgitate the food before 



entering nest . . . . . . . .225 



FIG. 138. Flicker's nest opened at the back and showing the feed- 

 ing operations which are going on inside . , . . 226 



