BIRD-MARKING IN THE NETHERLANDS, 55 
NOTE XII. 
BIRD-MARKING IN THE NETHERLANDS 
BY 
Dr. E. D. VAN OORT. 
Since May of this year the Museum of Natural History 
at Leyden is cargying into execution the inquiry into migra- 
tion and other movements of birds in the Netherlands by 
means of aluminium rings. The results will be published in 
this periodical and at the same time in Dutch in the periodical 
of the „Nederlandsche Ornithologische Vereeniging”. It is 
not necessary to give here particulars about our method of 
working or about the rings used, only I will remark that 
our rings are of ten sizes, The smaller rings are marked 
Mons one darger: ones ee A ay all of course also 
numbered. Since May more than 2500 rings have been 
sent to 40 persons, willing to co-operate at the scheme for 
marking birds in our country. As far as I can see from the 
received schedules, filled-in by the markers, 1165 of these 
rings have been used for the following 31 species: 
Ciconia ciconia 3, Phalacrocorax carbo 6, Anas boschas 160, 
Nettion crecca 2, Larus argentatus 84, Larus ridibundus 381, 
Sterna cantiaca 138, Sterna fluviatilis 170, Sterna minuta 2, 
Recurvirostra avosetta 14, Haematopus ostralegus 17, Vanellus 
vanellus 23, Totanus totanus 8, Pavoncella pugnaz 19, Athene 
noctua 1, Alauda arvensis 3, Sturnus vulgaris 26, Turdus 
musicus 17, Phoenicurus titys 9, Aëdon luscinia 3, Accentor 
modularis 3, Muscicapa grisola 1, Phylloscopus collybita 1, 
Parus major 10, Parus coeruleus 2, Anorthura troglodytes 4, 
Hirundo rustica 20, Delichon urbica 2, Fringilla coelebs 9, 
Chloris chloris 6, Passer montana 1, Passer domestica 18 
and Emberiza citrinella 2. 
‚Notes from the Leyden Museum, Vol. XXXIV. 
