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Vol 3 No. 4 - The Seabird Group

Vol 3 No. 4 - The Seabird Group

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2001 Flight altitudes of coastal birds 211<br />

11.10.<br />

12.10.<br />

14.10.<br />

27.10.<br />

31.10.<br />

02.11.<br />

03.11.<br />

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15.11.<br />

15.10.<br />

16.10.<br />

18.10.<br />

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24.10.<br />

08.11.<br />

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11.11.<br />

14.11.<br />

25 12 1,5 1,5 12 25<br />

25<br />

Flight altitudes, upper limits [m]<br />

12 1,5 1,5 12 25<br />

Flight altitudes, upper limits [m]<br />

Figure 4 . Common Eider flight altitudes on days with �W-SW winds off Wangerooge<br />

(upper) and Common Eider flight altitudes on days with �E-SE winds off<br />

Wangerooge (lower), autumn 1999. <strong>The</strong> bars show in each case the most<br />

frequent level; westerly migrants to the left, easterly to the right of the central<br />

axis.<br />

Figuur 4. Vlieghoogtes van Eiders op dagen met �W-ZW-winden langs Wangerooge<br />

(boven) en vlieghoogtes op dagen met �O-ZO-winden (onder), najaar 1999.<br />

De staven geven voor iedere dag de meest frequente vlieghoogte weer;<br />

westwaarts vliegende vogels links, oostwaarts vliegende vogels rechts van de<br />

y-as.

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