Wow that's a lot of Louisiana water thrushes! Interesting and timely post Hans. Sent from my iPod > On Apr 27, 2015, at 8:35 AM, Haans Petruschke <[log in to unmask]> wrote: > > Hi, > > During our bbs survey hike up Stebbins' Run (~ 41deg 36min N, 81deg 16 min > W) yesterday we found 9 Louisiana Waterthrushes in 6 distinct territories, > over a 1.8 km length of stream bed. The territories are remarkable in the > regularity of their spacing of about 300m. We can determine boundaries > because the birds will move up stream ahead of us to the edge of their > territory and then will fly back past us. The boundaries are also distinct > features such as a waterfall or side run. I also mark each location as a > point using GPS and can review the location data later. > > Louisiana Waterthushes are now fully established on nesting territory over > most of their range. They are among the earliest and most regular warbler > migrants we find, and are found on or about the first of April in northern > Ohio. > > Louisiana Waterthushes are a habitat specialist and make their living in > and around running water with a rocky or gravel bed. They are seldom if > ever found along still waters which are the realm of the closely related > Northern Waterthrush. Also northern Ohio and and southern Ontario are the > northern end of the breeding range for Louisiana Waterthrush and the > southern end of the breeding range for Northern Waterthrush. > > As previously stated extreme care is needed to identify a Louisiana > Waterthrush found in inappropriate habitat after the 3rd week of April. Due > to the similarity and often overlapping morphology of the Waterthrush > species this should only be done if you are very familiar with Louisiana > Waterthrush after extensive study becoming familiar with all their > vocalizations in the appropriate habitat. The probability far and away > favors any Waterthrush found along a lake, pond or marshy area being > Northern, in spite of what you might find on eBird. > > Haans > > ______________________________________________________________________ > > Ohio-birds mailing list, a service of the Ohio Ornithological Society. > Please consider joining our Society, at www.ohiobirds.org/site/membership.php. > Our thanks to Miami University for hosting this mailing list. > > > You can join or leave the list, or change your options, at: > listserv.miamioh.edu/scripts/wa.exe?LIST=OHIO-BIRDS > Send questions or comments about the list to: [log in to unmask] ______________________________________________________________________ Ohio-birds mailing list, a service of the Ohio Ornithological Society. Please consider joining our Society, at www.ohiobirds.org/site/membership.php. Our thanks to Miami University for hosting this mailing list. You can join or leave the list, or change your options, at: listserv.miamioh.edu/scripts/wa.exe?LIST=OHIO-BIRDS Send questions or comments about the list to: [log in to unmask]