Science that looks like art. Plates from the Annual report of the Board of Regents of the Smithsonian Institution for the year ending June 30, 1901.

"From a composite helio-chrome, made by Mr. Ives." Page 458.
“From a composite helio-chrome, made by Mr. Ives.” Page 458. Herschel. Plate 11. A. Hoen & Company, Lithocaustic, Baltimore. Collection of and digitalized by the Smithsonian Libraries. In the public domain. via https://archive.org/details/annualreportofbo1901smit/page/n457
"Humming birds." Paine. Page 809. Plate 11.
“Humming birds.” Paine. Page 809. Plate 11. A. Hoen & Company, Lithocaustic, Baltimore. Collection of and digitalized by the Smithsonian Libraries. In the public domain. via https://archive.org/details/annualreportofbo1901smit/page/n808
"Butterflies." Paine. Page 831. Plate X.
“Butterflies.” Paine. Page 831. Plate X. A. Hoen & Company, Lithocaustic, Baltimore, lithographer. Collection of and digitalized by the Smithsonian Libraries. In the public domain. via https://archive.org/details/annualreportofbo1901smit/page/n830

Hummingbird paintings straight from the tropics by American Martin Johnson Heade. Living from 1819 to 1904, he was from a place with cold winters but spent much time painting in warmer locales where he did these.

"Orchids and Hummingbird." Probably 19th c.
“Orchids and Hummingbird.” Probably 19th c. Image © University of Georgia, Athens, GA 30602. Fair use license. via https://news.uga.edu/artist-martin-johnson-heade/
"Passion Flowers and Hummingbirds." ca. 1870-1873.
“Passion Flowers and Hummingbirds.” ca. 1870-1873. Collection of the Museum of Fine Arts, Boston. In the public domain due to age. via https://collections.mfa.org/objects/33015
"Tropical Landscape with Ten Hummingbirds." 1870.
“Tropical Landscape with Ten Hummingbirds.” 1870. Image © 2019 Terra Foundation for American Art. Fair use license. via https://picturingtheamericas.org/painting/tropical-landscape-with-ten-hummingbirds/
Jungle Orchids and Hummingbirds. 1872. American. Oil on canvas. Martin Johnson Heade, painter (1819-1904). Yale University Art Galleries, New Haven. Artwork itself in the public domain. via https://artgallery.yale.edu/collections/objects/8959 though I found it here https://www.instagram.com/folesdog/p/DG3J1fCvNtx/?hl=en