Thank you for this. We have lived in our house in the Yorkshire Pennines for 18 years. It backs onto a large field kept short by horse grazing. Every Christmas day a flock of 30-40 dotterel would turn up while cooking Christmas dinner. A cheery sight. Recently they have been arriving late and staying longer. Late December seems an odd migration time and do not know if they are going.g to or from Africa at this time if at all. Still, always good to see them arrive and busy themselves on the field.