Common Cuckoo chick ejects eggs of Reed Warbler out of the nest.David Attenborough's opinion

This is a clip from "RHYTHMS OF NATURE IN THE BARYCZ VALLEY" movie.
This film tells the story about nature in the Barycz River valley and enormous Milicz ponds. This area is located in the south-western part of Poland (in the middle of Europe). I and my wife made it for 2 years.
Sir David Attenborough, a world-famous BBC nature documentary film maker, after watching the film "Rhythms of Nature in the Barycz Valley" wrote:
"I have viewed Rhythms of Nature with great pleasure.
A lovely place, beautifully filmed"
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