Looking at your post and the leaf I think both the insect and the cold acted on it, you can see the coloration change on the edges and the holes are very well marked there could have been the insect, the stems are starting to dry out.
I would like to think @mipiano that the feather flew and fell there so that your post looked its best. What a facility you have to describe and narrate what your eyes see. I congratulate you. I learn a lot from you. ☃️🌹❤️
You are right and a good observer. It is probably both. And you have a great ability to write and describe, so we all can learn from each other here. Thank you for your visit, @mamani 😇