I wanted to share this really cool hawk guide, I recently found, created by the Hawk Migration Association of North America (HMANA). This free guide is a PowerPoint presentation that combines photographs of flying raptors, silhouettes and in-flight identification tips to help improve your hawk watching skills. The guide has been out for a few months but I just came across it this past weekend thanks to RGVBirding Fest, who posted it on Twitter.
Here's some screen shots from the presentation guide:
The free guide is called Identification of Raptors of the Northeast and can be found here: http://hmana.org/read_article.php?id=12
HMANA is a membership-based organization committed to the conservation of raptors. They are the same organization that put out the Silhouette Hawk ID Guide about a year ago.
Like I mentioned, this guide is a Microsoft PowerPoint presentation. If you don't have PowerPoint on your computer you can download PowerPoint Viewer for free. PowerPoint Viewer allows you to view PowerPoint presentations but doesn't allow you to create or modify presentations.