Smart Crow is a Great Problem Solver

Crows are some of the smartest creatures in the animal kingdom. They are capable of making rule-guided decisions and of creating and using tools. They also appear to show an innate sense of what numbers are.

Researchers now report that these clever birds are able to understand recursion—the process of embedding structures in other, similar structures—which was long thought to be a uniquely human ability.

Corvus albicollis Latham, 1790 – white-necked raven or Cape raven (southern, central, and eastern Africa)
Corvus albus Müller, PLS, 1776 – pied crow (Central African coasts to southern Africa)
Corvus bennetti North, 1901 – little crow (Australia)
Corvus brachyrhynchos Brehm, CL, 1822 – American crow (the United States, southern Canada and northern Mexico)
Corvus capensis Lichtenstein, MHC, 1823 – Cape crow or Cape rook (east and southern Africa)
Corvus caurinus – northwestern crow (the Olympic Peninsula to southwestern Alaska)
Corvus corax Linnaeus, 1758 – common raven or northern raven (the Holarctic regions of the Northern Hemisphere)
Corvus cornix Linnaeus, 1758 – hooded crow (northern and eastern Europe and northern Africa)
Corvus corone Linnaeus, 1758 – carrion crow (Eurasia)
Corvus coronoides Vigors & Horsfield, 1827 – Australian raven (eastern and southern Australia)
Corvus crassirostris Rüppell, 1836 – thick-billed raven (Ethiopia)
Corvus cryptoleucus Couch, 1854 – Chihuahuan raven (southwestern United States and northwestern Mexico)
Corvus culminatus Sykes, 1832 – Indian jungle crow (India and Sri Lanka)
Corvus edithae Lort Phillips, 1895 – Somali crow (eastern Africa)
Corvus enca (Horsfield, 1821) – slender-billed crow (Malaysia, the Philippines, Borneo, Indonesia)
Corvus florensis Büttikofer, 1894 – Flores crow (Flores, Indonesia)
Corvus frugilegus Linnaeus, 1758 – rook (Eurasia, introduced to New Zealand)
Corvus fuscicapillus Gray, GR, 1859 – brown-headed crow (New Guinea)
Corvus hawaiiensis Peale, 1849 (formerly C. tropicus) – Hawaiian crow (Hawaii)
Corvus imparatus Peters, JL, 1929 – Tamaulipas crow (Gulf of Mexico coast of Texas and northeastern Mexico)
Corvus insularis Heinroth, 1903 – Bismarck crow (Bismark Archipelago, Papua New Guinea)
Corvus jamaicensis Gmelin, JF, 1788 – Jamaican crow (Jamaica)
Corvus kubaryi Reichenow, 1885 – Mariana crow or aga (Guam and Rota, Northern Mariana Islands)
Corvus leucognaphalus Daudin, 1800 – white-necked crow (Hispaniola)
Corvus levaillantii Lesson, RP, 1831 – eastern jungle crow (Indian subcontinent to the northern Malay Peninsula)
Corvus macrorhynchos Wagler, 1827 – large-billed crow (Himalayas, East Asia, the Malay Peninsula, Sunda Islands, and the Philippines)
Corvus meeki Rothschild, 1904 – Bougainville crow or Solomon Islands crow (Bougainville Island and Shortland Islands, Solomon Islands)[1]
Corvus mellori Mathews, 1912 – little raven (southeastern Australia)
Corvus minutus Gundlach, 1852 – Cuban palm crow (Cuba) (formerly conspecific with the Hispaniolan palm crow)
Corvus moneduloides Lesson, RP, 1831 – New Caledonian crow (New Caledonia)
Corvus nasicus Temminck, 1826 – Cuban crow (Cuba, Isla de la Juventud, Turks and Caicos Islands)
Corvus orru Bonaparte, 1850 – Torresian crow or Australian crow (Australia, New Guinea, Lesser Sunda Islands)
Corvus ossifragus Wilson, A, 1812 – fish crow (eastern United States coast)
Corvus palmarum Württemberg, 1835 – Hispaniolan palm crow (Hispaniola) (formerly conspecific with Cuban palm crow)