All posts by eontbird

Northern Red-tailed Hawk ID note

It is possible that here in the east, where we likely see few non-dark morph Western (calurus) Red-tails, heavily-marked and especially colourful Northern (abieticola) birds may tempt birders into categorizing one as a Western. Some of the “light” Northern (abieticola) birds are far from light in the traditional sense and are very orangish-reddish birds below. These birds more or less appear as “Intermediate” in plumage. It is not yet known whether polymorphism exists in the B. j. abieticola subspecies, such as the way it does in the B. j. calurus subspecies, but raptor experts are in agreement that dark morphs are very likely to occur. As ever, Matt Fraker said it best on a thread “Red-tailed Hawks are the Herring Gull of the hawk world.” No two look alike, and sometimes it’s just nice to enjoy their variable appearance and not slap a label on them. For easterners, we are blessed to not have to wrestle with subspecific ID the way that western and central continental birders have to. However, there are still intermediates and intermediates of intermediates, so try to not lose your head over the fine details!

Photo Acknowledgements: I thank Nigel Shaw and Brett Fried of Simcoe County Banding Group for giving prior permission to post these photos (






Red-breasted vs. Common Merganser

With Red-breasted (top) the bill appears proportionally quite long and is thin and ever-so-slightly up-turned; the forehead is abrupt and steep; the reddish tones to the head are muted. Look for a lack of white throat patch and a muted red grading through to the lower neck and nape. With Common, the bill is slightly thicker and slightly less up-turned; the bill more or less smoothly transitions to the forehead; the reddish tones to the head are deep. Look for a contrastive white throat patch and a stark delineation between the head and the lower neck (lacks a grading of reddish tones).