Along the Cache la Poudre River in northern Colorado, belted kingfishers nested in relatively tall banks that lacked a toe. Kingfishers constructed burrows in soils that contained significantly less sand than was present at systematically sampled points. This finding conflicts with earlier findings that indicate kingfishers select sandy soils for burrow construction. Otherwise, the physical characteristics of banks used by belted kingfishers in Colorado were similar to those found elsewhere.
Shields, S. J., & Kelly, J. F. (1997). Nest-site selection by Belted Kingfishers (Ceryle alcyon) in Colorado. American Midland Naturalist, 401-403.