Great Invasion of Crossbills in 1909. 341 
is not a common one in Belgium, and is of irregular passage 
there. 
Netherlands and Denmark .—What I have just said 
regarding Belgium will probably also apply to the Nether¬ 
lands and Denmark. 
Germany .—The recent invasion of Crossbills appears to 
have been of considerable magnitude and to have spread 
generally throughout the whole or greater portion of 
Germany. According to reports published in the ‘ Ornitho- 
logische Monatsberichte'’ and from information received from 
other sources, large numbers of the species were observed in 
many districts from the middle of June onwards throughout 
the summer and autumn. Among such districts may be 
specially mentioned the coast-regions of the North Sea, 
Heligoland, the East Frisian Islands, Pomerania, Hanover, 
Brandenburg, the Rhine Provinces, Saxony, Bavaria, Wiir- 
temberg, and Baden. No doubt there Lave been other 
districts and localities where the incursion has been very 
noticeable, but detailed information concerning them, and 
regarding the invasion generally, will probably be forth¬ 
coming in later numbers of the above-mentioned journal and 
in other publications. 
Switzerland .—As regards Switzerland Dr. Goeldi, of Berne, 
in reply to my inquiries, has kindly sent me a copy of a 
paper by Dr. H. Fischer-Sigwart, of Zofingen, published in 
the Yerhandlungen of the Schweiz. Naturforsch. Gesell- 
schaft for 1909, which contains an excellent account of the 
invasion of the Crossbill into that country. It is sufficient 
to say that in 1909 it was observed in many Cantons of 
Switzerland, and in some places in large flocks. It is said 
to have nested in July near Zofingen, and in other places. 
Austria-Hung ary .—The Crossbill invasion appears to have 
been conspicuous throughout the greater portion of these 
countries, and vast numbers are reported as having been 
observed in many districts. 
A report on the subject, published in the Hungarian 
ornithological journal ‘Aquila’ for 1909, a copy of which 
