Found in Berlin,Germany Area of Charlottenburg I want to know the species of this bird, someone please tell me. Approximate size 19 cm
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This is a Common Kestrel (Falco tinnunculus) primary wing feather, so it is indeed from a predatory bird. The orange hue suggests that this came from a juvenile and/or female individual. Featherbase provides a good reference here.
For future feather identification questions, you may wish to post them to the Found Feathers project on iNaturalist.