Eastern - A 3 1/2 reed call with premium heavy latex and a single split in the top reed to replicate those hard cutting and yelping hens from the East and Midwest. Osceola - A light 1 1/2 reed call with the same split as the "Eastern" to replicate the aggressive Osceola hen on the lighter side. Produces most of the Osceola hen vocabulary. Rio Grande - 1 2 1/2 reed call with light latex and a square cutter notch on the top reed with a slight split to replicate the high pitched vocals of those Rio Grande hens. Merriam's - A 2 1/2 reed call combined with light latex and a unique cut. First we make an average inverted V cut and then remove the tongue. This call will reproduce the high pitched rasp of a Merriam's hen.