Loggerhead Shrike (Lanius ludovicianus)

The loggerhead shrike is a medium-sized passerine.[13] "Loggerhead" refers to the relatively large size of the head as compared to the rest of the body. It measures approximately 9 inches from bill to tail. The wing and tail length is about 3.82 and 3.87 inches long, respectively.[13] It weighs on average 50 grams, with a range of 45-60 grams for a healthy adult shrike.[14] The adult plumage of the loggerhead shrike is grey above, with a white to pale grey breast and black tarsi and feet. The bird possesses a black mask that extends across the eyes to its bill. The wings are black, with a distinct white patch on the primaries. The tail is black edged with white and the irises are brown.[11] The beak is short, black, and hooked, and contains a tomial tooth to help tear into prey.[10] It is difficult to sex an adult loggerhead shrike in the field, as they are sexually monochromatic.[15] However, several studies have reported sexual dimorphism in plumage and size traits.[10][15][16] Juveniles possess a paler gray plumage that is subtly vermiculated.[17]

The loggerhead shrike can be distinguished from the northern shrike by its smaller size, darker grey plumage and larger black face mask that covers the eye completely. It also has a shorter bill with less prominent hook. Their calls are similar.[17]