55 
U O — ►W. Deze weg, door Eagle Clarke in zijn enorm werk 
(Studies in Bird-migration. Vol. II. pag. 10) uitvoeng beschreven 
hii wiidt er 9 pagina's aan) wordt gevolgd door tal van vogels, die 
volgens hem van uit Centraal- en West-Europa naar Engeland over- 
steken, hetzij om in Zuid-Engeland of Ierland te overwinteren, hetzi) 
om via Groot-Brittannië, zuidwaarts te trekken: ,, 
On certain days, when general movements are in progress these 
flights have often been known to cover the entire coastline between 
the Humber and the straits of Dover”, 
Tiidens het verblijf van den schrijver op het Lichtschip „Kentish 
Knock” *1 (van 17 September tot 18 October) passeerden Leeuwe- 
riken, Ringmusschen, Zwaluwen, Graspiepers, Spreeuwen, Vmken, 
Roeken en Kauwtjes; waarschijnlijk Zanglijsters, Groote Lijsters, 
Goudhaantjes en Kwikstaarten; 's nachts steltloopers. 
We halen het volgende aan: . . , . 
„In addition to the species named as participating in the great 
diurnal movements I have endeavoured to describe, Swallows and 
Martins in considerable, and Wheatears in lesser numbers were also 
observed moving westward independently. The fact that these 
species proceed along this route in autumn is the clearest possible 
evidence, if such were necessary, that it is also a true passage fly- 
line for migrants proceeding from the Continent via the English 
shores to their winter quarters South of the British Isles. Thes 
birds of passage, after arriving in south-eastern England, sooner 
or later take their departure from our southern coast, en route tor 
Africa in some cases, and south-western Europe m others. Oc- 
casionally during the daytime small numbers of the summer birds 
just mentioned, remarkable to relate, were proceeding from south- 
east tot north-west: proceeding north ere they sought the south, bu 
this was exceptional, and the movements, were never important 
^The reason why the movements of thes species are performed 
so "largely during the day -time, in stead of entirely at night, as is 
the case of most over-sea migrations, may be the comparative short- 
ness of the passage (about 180 miles at most), if direct east to west 
in the latitude of this lightship. The few hours necessary for its 
accomplishment would not interfere unduly with the time that must 
be devoted to the daily search for food- a most important conside- 
ration for all migrating birds.” 
Wat nu de waarnemingen te Noordwijk aan Zee betreffende deze 
l) „It is stationed in latitude 50« 38' 50” N and in longitude I» 39' 55” E 
lying 21 miles north-east-by-north of Margate, and 21 5 miles south-east of the Nase 
which are respectively the nearest points of land, while it is rnoorcd two m.les east 
of the extensive sandbank from which it takes its name-a bank which is entirely 
submerged at all states of the tide. 
I 
