CALENDAR OF ORNITHOLOGY FOR 1840. 
St. Kilda, Ailsa Crag, and even the Bass Rock, would yield an 
interesting daily journal, and we do hope for some interesting re- 
turns from our northern islands. 
There is yet another point worthy of attention, that is, the change 
in the general ornithology of a district or locality which has taken 
place within a limited period, by an alteration of its physical cha- 
racter ; by improvement, cultivation, draining ; by planting and the 
increase of wood ; by the rooting out and destruction of copse or 
natural wood; by the introduction of masses of some particular 
tree or brushwood. All these matters have a much greater in- 
fluence on animal life than at first imagined ; and in the space of 
twenty or thirty years, we have seen the character of a locality 
almost changed, by the forsaking of some species and the coming 
in of others. These changes go gradually on, but are at last 
complete, being naturally incidental to the artificial causes above 
mentioned. 
