THE flattering reception of my Essays by the public and the press having led to a second edition being called for within a year of its first publication, I have taken the opportunity to make a few necessary corrections. I have also added a few passages to the 6th and 7th Essays, and have given two notes, explanatory of some portions of the last chapter which appear to have been not always understood. These additions are as follows:
To avoid altering the paging the additional pages now given have been lettered.
Additional facts as to birds acquiring the song of other species.
Mr. Spruce's remarks on young birds pairing with old.
Pouchet's observations on a change in the nests of swallows.
Passage omitted about nest of Golden Crested Warbler, which had been inserted on Rennie's authority, but has not been confirmed by any later observers.
Daines Barrington, on importance of protection to the female bird.