Change ), You are commenting using your Twitter account. ( Log Out / From top to bottom: Specimens 1-3: Northern Waterthrush; Specimens 4-6: Louisiana Waterthrush, Pingback: The Royal Ontario Museum Ornithological Collection « Andreas Jonsson's Weblog, Pingback: The Royal Ontario Museum Ornithological Collection | Andreas Jonsson's Birding Blog. Ovenbirds lack the eyebrow stripe seen on Louisiana Waterthrushes. Loud ringing song carries well over rushing streams. Found along streams constantly bobbing its tail up and down as it walks. Same specimens as pictured above. To make things worse, the two species are quite similar-looking. The Northern Waterthrush has a narrower (sometimes yellowish) eyebrow, buffier underparts, and more streaking on the throat than the Louisiana Waterthrush. The perhaps most commonly used character, however, details of the supercilium or “eyebrow”, is not discussed. Like Northern Waterthrush, Louisiana also has a flight song, sometimes delivered at dusk. Long-legged warbler with an elongated body. A warbler that looks like a thrush with its long legs and long body. Hence they are difficult to spot, and often noticed only by song. Forages along rocky forested streams, often venturing out to rocks in the middle of the stream. Found in forests near streams. The Northern Waterthrush is often an unseen singer whose rich, sweet whistles lure listeners into its attractive habitats, the wooded swamps and bogs of northern North America. Forages primarily on the ground alongside forested streams, or on rocks or downed logs in the middle of the stream. The Northern Waterthrush is often an unseen singer whose rich, sweet whistles lure listeners into its attractive habitats, the wooded swamps and bogs of northern North America. Note white eyebrow that is wider at the back of the head. These streaky brown songbirds lack the bold colors of many other warblers and don’t forage in forest canopies. ( Log Out / Also, the tail on Northern extends further beyond the undertail coverts than on Louisiana (very subtle character). I compared specimens of Northern Waterthrush and Ovenbird in a previous post. Hence they are difficult to spot, and often noticed only by song. Call note of adults and juveniles is a very sharp, metallic chip. … Next look at the shape of the eyebrow stripe, which broadens to the rear … Identification of Waterthrushes Read More » Sorry, your blog cannot share posts by email. Perhaps the most diagnostic morphological feature is the throat, which is streaked in the Northern Waterthrush (below left) but plain in its "southern cousin." First Glance A quick judgment of the ground color of the breast and eyebrow stripe will separate most waterthrushes: bright white on Louisiana, yellowish on Northern. The Northern Waterthrush and the Louisiana Waterthrush are New World warblers preferentially foraging on the ground in wooded areas. Its brown plumage and bold streaking help explain why this member of the warbler family has the word “thrush” in its name. Post was not sent - check your email addresses! To make things worse, the two species are quite similar-looking. The photographs displayed here, showing skins from the underside, reveal a few useful characters that separates the Northern and Louisiana Waterthrushes. Prairie Warblers were out in force with 28 of them banded. Sings from elevated perches. From left to right: Specimens 1-3: Northern Waterthrush; Specimens 4-6: Louisiana Waterthrush. A yellowish waterthrush is definitely a Northern, while a whitish bird could be either species. Change ). Throat is usually unmarked. ( Log Out / The Northern Waterthrush, with a wing chord of 67-82mm, also tends to be a bit smaller than the Louisiana, whose wing chord measures 72-87mm. The Northern Waterthrush has a narrower (sometimes yellowish) eyebrow, buffier underparts, and more streaking on the throat than the Louisiana Waterthrush. The chin and throat on Louisiana are largely unmarked (although, note that the second bird from the right is an exception), while the throat on Northern has fine spots. It is very similar to the Northern Waterthrush, but has a more restricted range in both summer and winter. Fill in your details below or click an icon to log in: You are commenting using your WordPress.com account. Change ), You are commenting using your Google account. Change ), You are commenting using your Facebook account. Often found in areas with slower moving water than Louisiana. Song is a loud, sweet series of clear introductory notes followed by a slurred phrase that rises and falls. The Northern Waterthrush and the Louisiana Waterthrush are New World warblers preferentially foraging on the ground in wooded areas. First, note how the breast streaking is denser and stretch further down the side and belly on Northern than on Louisiana. The ringing song of the Louisiana Waterthrush, in cadence so like the rushing streams that are its home, is one of the first signs of spring in eastern North America. Brown above and streaked below, but has fewer streaks on the breast (and particularly the throat) than similar Northern Waterthrush. Comparison of Northern Waterthrush and Louisiana Waterthrush, The Royal Ontario Museum Ornithological Collection « Andreas Jonsson's Weblog, The Royal Ontario Museum Ornithological Collection | Andreas Jonsson's Birding Blog. However, note that in this sample set, this character is not diagnostic; the bill of the first Northern specimen is as thick as on the second and third Louisiana specimens, and the bill of the first Louisiana specimen is as slim as on the second and third Northern specimens. Forages along rocky streams in forests, and habitually bobs its tail as it goes. Waterthrushes don’t have a pronounced change in appearance between breeding and non-breeding plumage (as many other warbler species do); these images include both specimens in breeding and non-breeding plumages. The Northern and Louisiana Waterthrushes were recently moved from the Seiurus genus to the Parkesia genus, effectively separating the waterthrushes from the Ovenbird. Breast streaks are also said to be browner on Louisiana (black on Northern), but I find this character very variable, and not reliable in the field. Northern Waterthrush vs. Louisiana Waterthrush An unexpected wave of migrants greeted us in the nets this morning with 69 new birds and 7 recaptures of 12 different species. In the flight song, the bird begins with a rapid series of chips, which becomes a rapid twitter before the song is given high in the air, usually a faster version of the primary song.
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