( Log Out /  Change ), You are commenting using your Facebook account. Next look at the shape of the eyebrow stripe, which broadens to the rear … Identification of Waterthrushes Read More » Throat is usually unmarked. This will be the last post from my recent visit to the ROM Ornithological archive. The photographs displayed here, showing skins from the underside, reveal a few useful characters that separates the Northern and Louisiana Waterthrushes. 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. Long-legged warbler with an elongated body. Prairie Warblers were out in force with 28 of them banded. Found in forests near streams. First, note how the breast streaking is denser and stretch further down the side and belly on Northern than on Louisiana. Call note of adults and juveniles is a very sharp, metallic chip. Same specimens as pictured above. ( Log Out /  Found along streams constantly bobbing its tail up and down as it walks. Often found in areas with slower moving water than Louisiana. Hence they are difficult to spot, and often noticed only by song. Perhaps the most diagnostic morphological feature is the throat, which is streaked in the Northern Waterthrush (below left) but plain in its "southern cousin." … Hence they are difficult to spot, and often noticed only by song. A warbler that looks like a thrush with its long legs and long body. ( Log Out /  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. From left to right: Specimens 1-3: Northern Waterthrush; Specimens 4-6: Louisiana Waterthrush. The Northern Waterthrush and the Louisiana Waterthrush are New World warblers preferentially foraging on the ground in wooded areas. ( Log Out /  Brown above with a white eyebrow stripe that is wider at the rear. 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. Also, the tail on Northern extends further beyond the undertail coverts than on Louisiana (very subtle character). Forages primarily on the ground alongside forested streams, or on rocks or downed logs in the middle of the stream. 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. These streaky brown songbirds lack the bold colors of many other warblers and don’t forage in forest canopies. Change ), You are commenting using your Google account. It is very similar to the Northern Waterthrush, but has a more restricted range in both summer and winter. Forages along rocky streams in forests, and habitually bobs its tail as it goes. Change ), You are commenting using your Twitter account. To make things worse, the two species are quite similar-looking. Fill in your details below or click an icon to log in: You are commenting using your WordPress.com account. 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. Song is a loud, sweet series of clear introductory notes followed by a slurred phrase that rises and falls. 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. A yellowish waterthrush is definitely a Northern, while a whitish bird could be either species. I compared specimens of Northern Waterthrush and Ovenbird in a previous post. Post was not sent - check your email addresses! Its brown plumage and bold streaking help explain why this member of the warbler family has the word “thrush” in its name. To make things worse, the two species are quite similar-looking. 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. The Northern Waterthrush has a narrower (sometimes yellowish) eyebrow, buffier underparts, and more streaking on the throat than the Louisiana Waterthrush. Loud ringing song carries well over rushing streams. Furthermore, Louisiana is often pictured as having a disproportionately large bill. These streaky brown songbirds lack the bold colors of many other warblers and don’t forage in forest canopies. Like Northern Waterthrush, Louisiana also has a flight song, sometimes delivered at dusk. The perhaps most commonly used character, however, details of the supercilium or “eyebrow”, is not discussed. Ovenbirds lack the eyebrow stripe seen on Louisiana Waterthrushes. 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. The Northern Waterthrush has a narrower (sometimes yellowish) eyebrow, buffier underparts, and more streaking on the throat than the Louisiana Waterthrush. The Northern Waterthrush and the Louisiana Waterthrush are New World warblers preferentially foraging on the ground in wooded areas. Note white eyebrow that is wider at the back of the head. 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.

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