It is to the politeness of George Wilkie, Esq., who visited the Kays in the past Spring, that I am indebted for the present specimen, shot by him. In the United States this bird is found to prey principally upon ducks, which it appears to strike with its feet, but allows to drop to the ground before it secures them. If, as is probable, its predilection extends to other aquatic birds, its presence at the Pedro Kays, where such prey abounds, on which it may riot undisturbed, is not surprising. But, as the period of its occurrence is that of the migration of many species of ducks from the Spanish main to the United States, our bird may have been a follower, with predatory intent, of some of the many bands of migrant ducks which were passing the rocks about that time. The Prince of Canino has separated this species from the Peregrine Falcon of Europe, with which it was supposed to be identical. The European bird, which was renowned as the Tiercel and the Faucon of falconry, is inferior in its dimensions to our species. PIGEON-HAWK.[4] _Falco columbarius._ _Falco columbarius_, +Linn.+—+Wils.+ _Falco temerarius_, +Aud.+ pl. 75. [4] Length 12 inches, expanse 25, tail 4⁴⁄₁₀, flexure 7⁴⁄₁₀, rictus ⁸⁄₁₀, tarsus 1⁶⁄₁₀, middle toe 1, claw ¹⁄₂, closed wings 1¹⁄₂ inch short of the tip of the tail. Though of small size, this bird is not lacking in spirit and courage, often striking at prey nearly as large as itself. It hovers about the savannas, frequently flying very near the grass or bushes, but it seems to have favourite resorts. In the guinea-grass piece of Mount Edgecumbe, which stretches along the sea-shore from Belmont to Crab-pond, there are several hoary cotton-trees, (_Ceiba eriodendron_) of giant size, around which I have rarely failed to see more than one of these little Hawks. From one to another of these they sail on graceful wing, usually alighting on a prominent branch, near the summit. One which I shot from such a station, manifested no alarm at being aimed at, but peeped down as if its curiosity were excited. The smaller pigeons form the principal prey of this species; but sometimes it appears to be unequal to the conquest of its quarry. My lad observed a Hawk, one day, chasing a Pea-dove, which at length took refuge in a low bush, but was followed by the Hawk; the shaking of the bush showed that a struggle was going on, which seems to have terminated in favour of the gentle Dove, for presently both emerged, the Dove flew off, and the Hawk alighted on a tree close by; this same individual, being shot and wounded, fought bravely with both beak and feet, drawing blood from the hands of its slayer.