Pennsylvania Game News - May 2012 - 53

organic material and limestone into a settling pond to lower the acidity and remove heavy metals, as well as an attempt by the Department of Environmental Protection, using bioremediation techniques, to further improve stream quality. Consequently, Louisiana waterthrushes breed early and abundantly on Powdermill Run and late and sparsely on Laurel Run because of the lack of macroinvertebrates, especially caddisflies and mayflies, in the acidic Laurel Run. In fact, by 2009, no waterthrushes bred on Laurel Run, yet over the more than ten years of monitoring, Powdermill Run remains a hot bed of successful, breeding waterthrushes. Apparently, the availability of the proper food — namely macroinvertebrates that favor clean water — is very important for attracting breeding Louisiana waterthrushes. This study also made some natural history discoveries about Louisiana waterthrushes, according to Mulvihill, who directed the research. The males of this supposedly single-brooded, monogamous species occasionally engage in opportunistic polygyny, defined as pairing with two females at the same time. Eight times during the study, waterthrush pairs re-nested or double brooded after their first successful fledging of young. One female that started out on Laurel Run in her first year of breeding, transferred to Powdermill Run and brought off successful families for at least eight years. Today, Steven Latta, Director of Conservation and Field Research at the National Aviary, continues Louisiana waterthrush research, studying one of its wintering grounds in the Dominican Republic. He’s especially interested in how water quality there affects the survival of the birds and whether or not they return to their breeding grounds. He also wants to use the species to understand what affects neotropical bird populations throughout the year. He writes, in a recent article in Birding, that “in addition to acidification, breeding
MAY  2012 

success is likely linked to sedimentation and other forms of stream contamination, combined with the loss of surrounding vegetative cover in the riparian corridor… Preliminary results suggest that older, more mature forests with relatively high canopy cover, coupled with perennial streams that do not run dry in mid-summer droughts, are key drivers to reproductive success for such bird species.” Back at Powdermill, scientists are now concerned about the impacts of natural gas drilling on water quality, macroinvertebrates and Louisiana waterthrushes. And they have joined other ornithologists in the state to study the affects of hydraulic fracturing on streams throughout Pennsylvania. They hope that birders will help by counting waterthrushes along streams and reporting their numbers to their local watershed association. Two territories per kilometer are considered a healthy number of waterthrushes along a stream. Louisiana and northern waterthrushes were once lumped along with ovenbirds into the genus Sieurus, which means “to shake or move the tail,” but for decades Dr. Kenneth C. Parkes, the late curator of birds

53



Table of Contents for the Digital Edition of Pennsylvania Game News - May 2012

Pennsylvania Game News - May 2012
History of the Whitetail
26 Days for a Gobbler
I Took a Stand
Enemies Among Us
The Smile Says It All
Wild Turkey Trivia
Wild Turkey Cures A Heartache
First VPA-HIP Habitat Project Nears Completion
Field Notes
Conservation News
Off the Wire
Another View
The Naturalist’s Eye
Fun Game
Straight from the Bowstring
Lock, Stock & Barrel
Crossings
Pennsylvania Game News - May 2012 - Pennsylvania Game News - May 2012
Pennsylvania Game News - May 2012 - Cover2
Pennsylvania Game News - May 2012 - History of the Whitetail
Pennsylvania Game News - May 2012 - 2
Pennsylvania Game News - May 2012 - 26 Days for a Gobbler
Pennsylvania Game News - May 2012 - 4
Pennsylvania Game News - May 2012 - 5
Pennsylvania Game News - May 2012 - I Took a Stand
Pennsylvania Game News - May 2012 - 7
Pennsylvania Game News - May 2012 - Enemies Among Us
Pennsylvania Game News - May 2012 - 9
Pennsylvania Game News - May 2012 - 10
Pennsylvania Game News - May 2012 - 11
Pennsylvania Game News - May 2012 - 12
Pennsylvania Game News - May 2012 - 13
Pennsylvania Game News - May 2012 - 14
Pennsylvania Game News - May 2012 - 15
Pennsylvania Game News - May 2012 - The Smile Says It All
Pennsylvania Game News - May 2012 - 17
Pennsylvania Game News - May 2012 - 18
Pennsylvania Game News - May 2012 - 19
Pennsylvania Game News - May 2012 - Wild Turkey Trivia
Pennsylvania Game News - May 2012 - 21
Pennsylvania Game News - May 2012 - 22
Pennsylvania Game News - May 2012 - 23
Pennsylvania Game News - May 2012 - Wild Turkey Cures A Heartache
Pennsylvania Game News - May 2012 - 25
Pennsylvania Game News - May 2012 - 26
Pennsylvania Game News - May 2012 - 27
Pennsylvania Game News - May 2012 - 28
Pennsylvania Game News - May 2012 - 29
Pennsylvania Game News - May 2012 - First VPA-HIP Habitat Project Nears Completion
Pennsylvania Game News - May 2012 - 31
Pennsylvania Game News - May 2012 - Field Notes
Pennsylvania Game News - May 2012 - 33
Pennsylvania Game News - May 2012 - 34
Pennsylvania Game News - May 2012 - 35
Pennsylvania Game News - May 2012 - 36
Pennsylvania Game News - May 2012 - Conservation News
Pennsylvania Game News - May 2012 - 38
Pennsylvania Game News - May 2012 - 39
Pennsylvania Game News - May 2012 - 40
Pennsylvania Game News - May 2012 - 41
Pennsylvania Game News - May 2012 - 42
Pennsylvania Game News - May 2012 - 43
Pennsylvania Game News - May 2012 - 44
Pennsylvania Game News - May 2012 - 45
Pennsylvania Game News - May 2012 - 46
Pennsylvania Game News - May 2012 - Off the Wire
Pennsylvania Game News - May 2012 - Another View
Pennsylvania Game News - May 2012 - 49
Pennsylvania Game News - May 2012 - 50
Pennsylvania Game News - May 2012 - The Naturalist’s Eye
Pennsylvania Game News - May 2012 - 52
Pennsylvania Game News - May 2012 - 53
Pennsylvania Game News - May 2012 - Fun Game
Pennsylvania Game News - May 2012 - Straight from the Bowstring
Pennsylvania Game News - May 2012 - 56
Pennsylvania Game News - May 2012 - 57
Pennsylvania Game News - May 2012 - 58
Pennsylvania Game News - May 2012 - 59
Pennsylvania Game News - May 2012 - Lock, Stock & Barrel
Pennsylvania Game News - May 2012 - 61
Pennsylvania Game News - May 2012 - 62
Pennsylvania Game News - May 2012 - 63
Pennsylvania Game News - May 2012 - Crossings
Pennsylvania Game News - May 2012 - BB1
Pennsylvania Game News - May 2012 - BB2
Pennsylvania Game News - May 2012 - Cover3
Pennsylvania Game News - May 2012 - Cover4
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