What characterizes a broad-winged hawk in terms of size and coloration?

A broad-winged hawk is characterized as being smaller than a red-shouldered hawk while being similar in size to a Cooper's hawk. The broad-winged hawk is a medium-sized raptor with a stout body and broad wings, which is an important physical trait that differentiates it from other hawks.

In terms of coloration, broad-winged hawks typically exhibit subtle coloration with a mix of dark and light browns as opposed to being vividly colorful or displaying bright markings. This subdued coloring helps them blend into their woodland habitat. Thus, D is the right answer as it correctly identifies the size comparison while also covering the general characteristics of broad-winged hawks in relation to other species.