Others have separated from it the crossbills, under the title of Loxiidae, but without due cause.
The birds of this genus - the crossbills - when their other characters are taken into account, prove to be intimately allied on the one hand to the grosbeaks (Pinicola) and on the other through the redpolls (Aegiothus) to the linnets (Linota) - if indeed these two can be properly separated.
Depending mainly for food on the seeds of conifers, the movements of crossbills are irregular beyond those of most birds, and they would seem to rove in any direction and at any season in quest of their staple sustenance.
Notice of a like visitation in 1593 is recorded, but of late it has become evident that not a year passes without crossbills being observed in some part or other of England, while in certain localities in Scotland they seem to breed annually.
Creepers, nuthatches, shrikes, and their allied forms, flycatchers and swallows, thrushes, dippers and babblers (about fifty species), bulbuls and orioles, peculiar types of redstart, various sylviads, wrens, tits, crows, jays and magpies, weaver-birds, avadavats, sparrows, crossbills and many finches, including the exquisitely coloured rosefinches, may also be mentioned.