The Groove-billed Ani is about 34 cm long, and weighs 70-90 g . It is completely black, with a very long tail almost as long as its body. It has a huge bill with horizontal grooves along the length of the upper mandible. It is very similar to the Smooth-billed Ani, some of which have bills as small as the Groove-billed and with grooves on the basal half. The two species are best distinguished by voice and range. In flight, the ani alternates between quick, choppy flaps and short glides.
The San Lucas ani is classified as Least Concern. Does not qualify for a more at risk category. Widespread and abundant taxa are included in this category.
Nothing known about the San Lucas ani