The Buteos, or hawks, are a genus of birds whose phenotypes and hunting styles vary greatly between different geographic areas. This difference can be observed in two species of buteos, the Swainson hawks and the Broadwing hawks which are primarily located in opposite regions of the United States. The Swainson hawk is a long distance migrant that breeds along the western states. This large predator has an average length of 19-22 inches, and a wingspan of 46-54 inches. It prefers to hunt in open areas, in habitats such as plains, farmlands, or dry grasslands. Although the bird is large in size, it primarily feeds on small birds, small mammals, reptiles, but primarily catches insects midair. In contrast, the Broadwing hawk which is located in the east states is among the smallest of buteos, with length of 13-18 inches, and a wingspan of 32-38 inches. It has a broader diet than the Swainson hawk, but also feeds on small mammals, reptiles, and insects. This bird prefers to hunt from a perch, waiting for prey along woodland and forest edges or near bodies of water. Broadwings seems to prefer forests to wait for insects while the Swainson hawk favors catching its prey midair in clearings. Broadwings do not prefer to hunt on the wing, and have smaller more rounded wings. Hence because they do not hunt on the wing as frequently, they do not need to have large wings like the Swainson, which primarily hunts while soaring and migrates farther distances.
Comments
Suggestion
You use the word "primarily" twice in one sentence to refer to two different hunting modes for one bird. This doesnt make grammatical sense because "primarily" implies that there is one preferred hunting method.
repetition
You repeatedly use the word primarily throughout the text just don't use that word in the paragraph besides once since it is a word that will stick out to the reader. In, "Although the bird is large in size, it primarily feeds on small birds, small mammals, reptiles, but primarily catches insects midair. " just get rid of the first primarily and you can keep the second one in this sentence. In the other sentences just get rid of the word primarily all together.
"Broadwings seems to prefer",
"Broadwings seems to prefer", using the word "seems" makes it appear that you are assuming and are not sure of what you are talking about.