LINN.EAN CLASS SECOND. 



AVES. 



* - > 



BODY COVERED WITH FEATHERS ; LUNGS PLACED 

 NEAR THE BACK-BONE, THE BIRD VOLUNTARILY 

 FILLING WITH AIR, NUMEROUS CELLS, DISTRIBU- 

 TED THROUGH THE BODY AND HOLLOW BONE8. 



DIVISION I. LAND BIRDS. 



ORDER I. ACCIPITRES. 



Birds of prey, bill and claws strong, hooked ; body 

 muscular ; female larger than the male. 



Stomach thin, and muscular fibres small (commonly 

 called a membranous stomach,) possessing the power 

 of disgorging innutritious matter, such as fur, bones, 

 and feathers. 



Carnivorous ; digestion* effected by the gastric juice 

 alone ; intestines short. 



* The organ of digestion in birds consists of two parts. 

 The upper extremity of the stomach, or rather termination 

 of the (Esophagus, is surrounded with a zone of glands for 

 the secretion of the gastric fluid, and is called Bulbus Glan- 

 dulosus : the lower part, or digesting stomach, is furnished 

 either with a thin muscular coat, as in the Accipitres, 

 with a thick muscle, denominated gizzard, as in the swan, 

 or with a structure of an intermediate kind as in the 

 Guillemot. 



