A portrait of the dromaeosaurid Saurornitholestes langstoni from the Late Cretaceous of North America. This dinosaur was described in 1978 based on a fragmentary skeleton from the Dinosaur Park Formation (Alberta). Two more specimens and many isolated bones from Alberta and Montana were subsequently assigned to this genus. A nearly complete skeleton was discovered in 2014, and its skull was described in 2019. The dinosaur's snout was found to be taller and wider than that of Velociraptor, despite similar size. The premaxillary teeth, with longitudinal ridges, are intriguing. The large second tooth, heavily worn on the inner side, is particularly striking. A similar tooth was described in 1876 as Zapsalis abradens. They likely belonged to a close relative of Saurornitholestes (if not the same genus). It is believed that these teeth, like the pectinate claws of some birds, were used for grooming feathers.