There are 12 recognized subspecies of the Roadside Hawk (Buteo magnirostris). 
​The one occurring in Guatemala is Buteo magnirostris griseocauda.

First 3 photos: San Benito, Petén, Guatemala, 20 January 2020
Last 2 photos: Tikal, Petén, Guatemala, 23 & 24 January 2020