Our fourth consecutive season of Monitoring Avian Productivity & Survivorship (M.A.P.S) is well underway; nearly half finished, actually. We’ve now completed our third of seven visits to each station. As previously discussed results from our first three years of M.A.P.S indicated a sharp, incremental decline in abundance and diversity of terrestrial avifauna in Frontenac woodlands and rock barrens since 2009. The breadth and severity of the decline was foremost in our minds as we walked the trodden paths from usual empty net to empty net in 2011. Hope springs eternal and a new season began in early June 2012. Below is an update on this year’s results to date for Maplewood and Rock Ridge.
First the good news. Numbers of birds are up from last year at MABO, although still considerably lower than in 2009. For comparison, in 2009 we captured 91 birds total through visits 1-3 (72 new/19 rec) while we’ve captured 60 (39 new/21 rec) for the same period in 2012. Very pleased to see that Nashville Warblers and Northern Waterthrushes have returned to the site. We banded a whopping eight Northern Waterthrushes here in 2009 but didn’t even hear or see one a year ago. We’ve banded two adults of each species so far in 2012. Annual totals of Veery and Wood Thrush have been relatively consistent in abundance since 2009 and have returned in expected numbers again this year. Two new species have been recorded for the site; a singing Brown Creeper was detected on June 7 and White-throated Sparrows have been recorded singing on each visit. Notable absentees so far include cuckoos, Hermit Thrush and Field Sparrow.
It’s been a strong year for Yellow-rumped Warblers at MABO. I’ve also observed an unusually high number of adults feeding fledged young in Frontenac Provincial Park this spring/summer – good signs for this northern species in the region. While it’s still too early to judge this M.A.P.S season at MABO, with less than half of the work completed, we are seeing some positive signs of a possible rebound. Weather conditions have been closer to normal during this breeding season than any previous season since our studies began.
American Redstarts are one of the most commonly sampled species at MABO, although they are infrequent nesters within the station boundaries proper. They mainly occupy habitats at the edges of the station but we do manage to capture them later on in the summer when adults and young disperse. In 2009 at least two pairs nested along the shrubby perimeters of small wetlands within the station but they’ve not returned since. Gorgeous bird – one of my favourites.
Rock Ridge (RRID)
While things seem promising at MABO, the same cannot be stated for Rock Ridge (RRID) where numbers are a little down from last season and at least a few species seem to be struggling: most notably Eastern Towhee and Field Sparrow. Both are species of conservation concern due to significant negative trends evident in continental BBS and MAPS data. At our stations these species have consistently decreased in abundance annually since 2009. Urban expansion and changing rural landuse practices seem to be the most commonly suggested causes for the declines in both species, although these issues are less applicable in our region. On the other hand, White-throated Sparrows appear to have rebounded nicely after a near no-show in 2011. Also, the only Pine Warbler that we’ve banded during M.A.P.S was spotted feeding fledged young on June 28, 2012. The bird was originally banded as an immature male on July 18, 2010.
2011 was not a good year for cuckoos. For the first time we failed to capture one during a M.A.P.S season. This Black-billed was a welcome capture on June 18, 2012 at RRID. However, their numbers are clearly down from our first two seasons. This is true for most species at the station – present but substantially fewer in number. Rock Ridge begins to shine in July when birds abandon territories in search of food with their young so it will be interesting to see how the year will pan out at the station.