P. darwinii

P. darwinii may refer to:
 * Pachycondyla darwinii, Forel, 1893, an ant species in the genus Pachycondyla found in India
 * Pacifigorgia darwinii
 * Parahelops darwinii
 * Pleurodema darwinii, the four-eyed frog, a frog species found in Brazil, Chile, Uruguay and possibly Argentina
 * Pleuropetalum darwinii, a plant species endemic to Ecuador
 * Pterocnemia darwinii, the Darwin's Rhea, a large flightless bird species found in the Altiplano and Patagonia in South America