The Subfamily Cuculinoe contains those Indian Cuckoos which are parasitic on other birds, laying their eggs in their neats and trusting to them to hatch and rear the young ones.
In a work of the scope of the present one it is obvious that it would be impossible to deal fully with the breeding habits of the Cuckoos and the many questions in connection therewith which are yet unanswered. Nor would it be possible to consider the many and contradictory theories which have been suggested in regard to the origin of parasitism, its evolution, and its results.
In this volume the author confines himself to the simplest and easiest of facts which may assist to some extent in identification of the Cuckoos’ eggs and will enumerate the principal fosterers in the nests of which the eggs may be found.
At a future date, if the author lives long enough, he hopes to write another work, solely on parasitic Cuckoos, in which he can deal more fully with this very fascinating subject and, to the best of his ability, discuss the various theories and review the evidence for and against them.
The non-parasitic Cuckoos will be dealt with in the same manner as all other birds.