<>K IHK'-.l-.-HMXED STICKLEBACK. MAKING A NEST OF 

 I.UED TOGETHER BY VISCID THREADS SECRETED 

 FROM THE KIDNEYS AT THE BREEDING SEASON 



A FEMAI.K STICKI.EHACK ENTERS THE NI'> I WHICH THK MALE 

 HAS MADE, LAYS THE EGGS INSIDE, AND THEN DEI'AKTS 



In many cases two or three females use the same nest, the stickleback 

 being polygamous. Above the nest the male, who mounts guard, is seen 

 driving away an intruder. 





