THANKS TO...
DL: Fantastic guiding by Diego Gallegos (buenosairesbirding.com)
Special thanks to Simon Rowland and the team at Wildfoot Travel (wildfoottravel.com) for facilitating my trip.
David stayed at the Esplendor Plaza Francia (esplendorhoteles.com)
Reference guides: Collins Birds of Southern South America and Antarctica – Martín R. de la Peña & Maurice Rumboll