Among gallinaceous birds besides the red-legged partridge, which is met with everywhere on the steppes, there are found also the Pterocles alchita and P. arenarius; and among the birds of other orders are the southern shrike (Lanius meridianalis), the Spanish sparrow (Passer cyaneus), and, the blue magpie (Cyano pica cooki).
The existing genera include Anas, Aquila, Bubo, Columba, Cypselus, Lanius, Picus, Phalacrocorax, Sula, &c. Very interesting is the fact that Serpentarius, Psittacus and Trogon are amongst this list of birds, which are now restricted to the tropics.
The true Tapaculo (P. albicollis) has a general resemblance in plumage to the females of some of the smaller Shrikes (Lanius), and to a cursory observer its skin might pass for that of one; but its shortened wings and powerful feet would on closer inspection at once reveal the difference.