S166 * Montagu's Harrier * Blouvleivalk * Circus Pygargus

By https://www.flickr.com/photos/francesco_veronesi/ -  https://commons.wikimedia.org/w/index.php?curid=36447674

Falcon Valk

Sources:
(*) https://en.wikipedia.org/wiki/Montagu%27s_harrier
(*) https://ebird.org/species/monhar1
(*) https://search.macaulaylibrary.org/catalog?taxonCode=monhar1