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| Verwey, J.. |
| INTRODUCTION. A complete description of the summer plumage of Tringa canutus never seems to have been given. For this reason alone it might be of some value to describe it in more detail than has been done before. The chief object of the present paper, however, is not the description of the summer dress, but the discussion of a problem connected with it, which is of much more general interest. As the same problem presents itself in the summer plumage of one of the Knot's nearest relatives, the plumage of this bird, Tringa crassirostris, will be dealt with in the latter part of the present paper. I have to thank my friend Dr. H. Boschma for his valuable assistance in the preparation of this paper. III. THE PLUMAGE OF TRINGA CANUTUS L. 1. MATERIAL. The... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.83. |
| Ano: 1927 |
URL: http://www.repository.naturalis.nl/record/319035 |
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| Verwey, J.. |
| Our knowledge concerning the periodical movements in animals called migrations is chiefly based on observations on birds. By and by, however, a number of facts concerning migration in other animal groups have been assembled and it seems worth while to compare them with those known for birds. There is the more reason to do so here, because the victim of this jubilee is interested in birds and fishes alike. Though I shall not restrict myself to these two groups they will take more place than the rest. In the following I shall deal with North to South and South to North migrations chiefly. In the hope to succeed and make my ideas comprehensible to those who are not specially acquainted with this particular field I shall begin with a very short description of... |
| Tipo: Article / Letter to the editor |
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| Ano: 1949 |
URL: http://www.repository.naturalis.nl/record/504069 |
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