Biology 18A Crossword
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
 
 
Down: 1) initial feathers of young birds and underlying, insulating feathers in adult birds3) series of hollow chambers connected to the respiratory system of birds4) enables birds to live year-round in warm climates where food remains abundant enough to supply their enormous needs5) the shaft portion of a feather that extends below the vane6) any of the outer feathers on a bird; includes the flight feathers7) young bird that is naked and helpless when hatched9) long curved claws found on birds of prey12) the ridge on a bird's sternum13) a portion of the digestive tract that temporarily stores food15) the male bird's attempt to attract a mate18) the white of an egg Across: 2) the song box6) the class birds are in8) a thick-walled digestive organ that grinds food10) the terminal portion of the digestive tract in certain vertabrates that serves as a common passageway for the elimination of urine and feces11) extend from the wings and tail; also contour feathers14) the flat part of a feather16) a bird that has a long incubation period and is usually able to care for itself when it hatches17) the slender, central part of a bird's feather from which the barb protrudes19) produces digestive juices
 

 

Create your own Crossword Puzzle for Free!		  Show Errors as I Type