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Can city crows be trained to habitually clean up discarded cigarette butts?

A project in The Netherlands aims to train crows to habitually clean up discarded cigarette butts. The cigarette buts were presumably discarded by humans. The project describes itself this way:

Cigarette filters, you find them in the park next to you in the grass, in dirty ditches and under your shoes. What if we could find a way to collect these butts from all corners of our city and precious parks? With crows, that have become perfectly adapted to city life, we can! By training crows to recognize and pick up cigarette filters we can solve this tenacious problem of city pollution. It is the Crowbar that does the training for us and gives out food as a reward…

Kees Moeliker wrote a deep appreciation (in Dutch) of the project.

Tomonews produced this animated explanation:

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