Diario de spyr

Looking for an ID for this poor bird. Can anyone help? Unfortunately, there isn't a picture of its back which was of a light greyish-brown.

Isn't it wonderful, how the i-Naturalist project helps you get in touch not only with people who care about nature, but also who can really help you with the identification of your more difficult observations? A European robin is a most likable and common bird in this area. But before starting with iNaturalist, I had no idea, that its underfeathers were actually black! Two additional IDs helped me understand more about an "unknown" dead bird found in the street.
Speaking of... Are there any specialists around who recognize some of these wildbees, a hoverfly and two trees?