74 JAMES SCHENK 



on the birth place itself and lastly the third, nine years of age also on 

 its birth place. Perhaps we will yet get news of the captivation of the 

 fourth. Through this family the faithfulness of the Marsh Harrier to its 

 native country is no more to be doubted. 



Black headed Gulls {Lams ridihundus), Night Herons (Nycticorax 

 griseus) Squacco Herons (Ardea ralloides), were found on the well kno\Mi 

 „ Great-Migration-Road-Trace, "^) of hungarian birds in Italy. The two Herons 

 in quite high age. On the same trace seems as well to lie the „Migration- 

 Road" of the Red Kite (Milvus ictinus), as a specimen was recorded 

 in Istria. This year we got the first information about the winter quarters- 

 of the Ibis, which is situated in south-Spain, according to the place 

 of discovery, which is Seville. To the present not one, of 1000 banded 

 Ibises were found outside the limits of the country ; only now a seven 

 years old specimen was stated and it is only under the supposition that 

 also the Ibis returns to its native colony, that we dare to confirm 

 south-Spain, as its winter quarters. On account of this occurence the 

 migration-road of the Ibis lies on the below mentioned 



via-pcMlana-lif/ui 'ica -Jiispai i lea 



„ Migration-Road-Trace " . 



It will not escape the experts' attention, that with the word „Mig- 

 ration-Road-Trace" a new perception has been introduced. The discussion 

 between Geyr^) and Lucanus^) about the jnigration-roads had by all 

 means the result to arouse the interest of the professional circles and 

 to make them aware, that the nomenclature in this question is insufficient. 

 One must in fact make a diffeience beween the migration roads which 

 are used by single species and those used by several or many species. 

 The last is a no longer adequate expression and must therefore get a 

 separate denomination. First of all we must take into consideration the 

 phenomenon itself and try to make evident the different kinds of migration. 



The unity is the traveling road of a single individual, or of a flight, 

 of those species which move on in a body. If these single migration roads 

 are more or less paralell, so that each bird, or a group of birds breaking 

 up at the same time, travels its own way and the individuals of breeding 

 territories lying one next to the other, which in generality occupy in the 

 same succession winter quarters, or such districts, where they are only 

 passing through and which are lying also one near the other, we get the 

 so called „Broad -Front-Migration-Road" which develops into the „Migration- 



') Via adriatica-italica sicilica, tunisiea-Aquila XXII. 1915. p. 274. — 275. 

 *) To the theory of bird-migration Journal for ornithology LXX. 1922. p. 385. — 397. 

 ^) Answer to the work of Baron Geyr von Schweppenburg : .,To the theory of 

 bird migration Journal for ornithology LXX. 1922. p. 885. — 397. 



