First published in English, in London, England, in 2015, as: Polly and the Puffin.
Summary
"Polly heard a crash downstairs. Was it a monster? No! Was it a spider? No! It was a little puffin with a broken wing ... When Polly discovers an injured Puffin, she and her mother look after him in their cottage by the sea. Slowly, Neil's wing heals and Polly must prepare herself to say goodbye to her new friend. Will she ever see him again?" -- edited synopsis from various websites