The image above is just a detail of an ancient map, Tabula Magellanica qua Tierrae del Fuego drawn in 1671 by John Ogilby and Jan Janssonius. The Strait of Magellan can be seen just above the two central blue colored arrows. The Pacific Ocean is on the lower left side, by the green arrow.
The map shows several animals and some natives too, on the island, named Magellanica.
Normal people and animals
The map shows some Rhea or ñandu being hunted by the local natives (though there are no "South American ostriches" on the island - see my post about the intriguing ohi for more on this matter). The "ostriches" are marked with blue colored arrows and are roughly to scale.
Then there are two penguins (green arrow), also drawn to scale.
But then, there are two bulky bodied animals with long swan-necks and also long tails (marked with the red arrows), which have a bird-like (or reptilian) look.
They are quite similar to an image that I posted some time ago in my post Patagonian living dinosaurs.
I wonder what they are. They are big, about the size of an adult person. Too big to be any of the known Patagonian birds.
Patagonian Monsters - Cryptozoology, Myths & legends in Patagonia2010 International Year of Biodiversity Copyright 2009-2010 by Austin Whittall ©