Wonderful black and white vintage drawing of a group of nesting flamingos. Made from mud, these large nests allow these tall birds a quick get-away if danger threatens. This flamingo drawing is in the public domain and downloadable.
The Zoo from 1895 is full of wonderful bird drawings by the artist Harrison Weir (1824-1906), including this one.
This image is copyright free and in the public domain anywhere that extends copyrights 70 years after death or at least 120 years after publication when the original illustrator is unknown.