Verbreitungsgebiet der Hudsonweihe (<i>Circus hudsonius</i>).<br><p>Orange: Breeding distribution<br>
Green: All-time distribution<br>
Blue: Wintering distribution<br></p>
Based on: James Ferguson-Lees &amp; David A. Christie: <i>Greifvögel der Welt</i>. Franck-Kosmos Verlag, Stuttgart 2009. <a href="//commons.wikimedia.org/wiki/Special:BookSources/9783440115091" title="Special:BookSources/9783440115091">ISBN 9783440115091</a>, p. 142.
<a href="//commons.wikimedia.org/wiki/User:Toter_Alter_Mann" title="User:Toter Alter Mann">Toter Alter Mann</a>
<span class="int-own-work" lang="en">Own work</span>