BeaEulenarten, die überwiegend tagsüber jagen, haben in der Regel Augen mit gelber Iris. Ist die Iris rotorange jagen sie in der Dämmerung und ist sie dunkel, dann jagen die Eulen nachts. Der Waldkauz ist also ein nächtlicher Jäger.<br>
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Quelle: Josef H. Reichholf - Ornis - Das Leben der Vögel<br>
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