Birch forest by CyjanekPotasu
science-junkie:

An identification chart of 42 North American butterflies.
By artist Eleanor Lutz. You can find the full sized GIF here or pick up a poster for your room here.
barkbox:

"I’m here to pup you up." - @pawfectyorkies http://ift.tt/1tzTzBQ
smithsonianlibraries:

Wilhelm C. H. (Wilhelm C. Hartwig) PetersNaturwissenschaftliche reise nach Mossambique, auf befehl Seiner Majestät des königs Friedrich Wilhelm IV, in den jahren 1842 bis 1848 ausgefḧrt, von Wihelm C. H. Peters. Zoologie , 1852-
In the collection Butterflies and Moths in our Galaxy of Images.
assgod:

YOU CAN TELL HE’S SO PROUD OF HIMSELF AND SO AM I
heaveninawildflower:

'Thistle and Landscape' by Fidelia Bridges (1834-1923). Chromolithograph published by Louis Prang & Co.
Image and text courtesy NYPL Digital Gallery.