"I am decidedly of the opinion that in very many instances we can trace such a necessary connexion, especially among birds, and often with more complete success than in the case which I have here attempted to explain"

In this quote, Alfred Russel Wallace is revealing his belief that there is a strong connection in between various species of birds. He recommends that this connection can be observed and comprehended in most cases, which it is frequently simpler to do so with birds than with other animals. Wallace also discusses that he has actually attempted to explain a specific case, however indicates that this may not constantly be possible. Overall, he is stressing the value of acknowledging and comprehending the connections in between various species, especially amongst birds.