Quote: the life of wild animals is a struggle for existence; procuring food, avoiding attacks, preserving their offspring, preserving the species

Quotation

The life of wild animals is a struggle for existence. The full exertion of all their faculties and all their energies is required to preserve their own existence and provide for that of their infant offspring. The possibility of procuring food during the least favourable seasons, and of escaping the attacks of their most dangerous enemies, are the primary conditions which determine the existence both of individuals and of entire species.   Google-1   Google-2

Published before 1923

Related Topics

Topic: evolutionary systems (38 items)