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Uromacer oxyrhynchus is a thin colubrid tree snake with a pointed snout. It is remarkably elongate and may reach body lengths of 1500mm (measured from snout to vent). This species shows color variation within a single population. One form of the snake is green all over, while others may be green above and tan below, or either gray or tan both above and below. All color varieties exhibit a prominent white lateral line.
Uromacer oxyrhynchus is one of three species in the genus Uromacer, a genus that is endemic to Hispaniola. It is found on both Haiti and the Dominican Republic and their satellite islands, although it is primarily distributed throughout the regions corresponding to the "North Paleoisland" of Hispaniola. Uromacer oxyrhynchus is extremely similar in appearance to U. frenatus, its closest relative, but is generally larger. Also, the ranges of Uromacer oxyrhynchus and U. frenatus only overlap in a few areas and geographic location can often be used for identification. This species is found in both wet and dry areas and is common in Acacia scrub.
Uromacer oxyrhynchus is diurnal and arboreal, and sleeps coiled up at the ends of branches at night. It is a sit-and-wait forager that specializes on lizards. Of the three Uromacer species, U. oxyrhynchus is the most trophically specialized: lizards in the genus Anolis make up over 80% of its diet.
The conservation status of U. oxyrhynchus has not been assessed.