Chapter XV.

1. The halcyon is not much larger than a sparrow; its colour is blue and green, and somewhat purple; its whole body is composed of these colours as well as the wings and neck, nor is any part without every one of these colours. Its bill is somewhat yellow, long, and slight; this is its external form. Its nest resembles the marine balls which are called halosachnæ,[227] except in colour, for they are red; in form it resembles those sicyæ (cucumbers) which have long necks; its size is that of a very large sponge, for some are greater, others less. They are covered up, and have a thick solid part as well as the cavity; it is not easily cut with a sharp knife, but when struck or broken with the hand, it divides readily like the halosachnæ. The mouth is narrow, as it were a small entrance, so that the sea-water cannot enter, even if the sea is rough; its cavity is like that of the sponge; the material of which the nest is composed is disputed, but it appears to be principally composed of the spines of the belone, for the bird itself lives on fish. It also ascends rivers; it does not produce more than five eggs; it continues to reproduce throughout the whole of its life, from the time of being four months old.