Identify the bird species, all beginning with the letter "O" in their common name. Species names according to the British Ornithologists' Union's "The British List" - https://bou.org.uk/wp-content/uploads/2016/07/British-List.pdf
This quiz uses Adult Male Summer/Light (and when applicable Breeding) Coats for reference
Answers ordered by their binomial scientific name in ascending alphabetical order
Start by naming any country that France borders. Then name any country that borders any of those countries. Then keep going until there are no more countries left to name.