DOMESTICATED ANIMALS 



33 



vented from doing so by tlie father. In very few 

 species of fishes do the females care anything for 

 either the eggs or yonng. Among fishes, there- 

 fore, the instinct to save the young is not the won- 



THE STICKLEBACK FATHER GUARDING HIS NEST 



derful ''mother instinct ^^ found in the human and 

 other higher species, but the father instinct. 



Among all animals that mate for life, birds and 

 men alike, parental love is more evenly divided be- 

 tween the two sexes than it is among those races 



