Pennsylvania Game News - October 2008 - 13

Got eggs? Both mallards and wood ducks will nest in hen houses. Mallard eggs are light green to gray or white buff colored and about 1½ by 2¼ inches while wood duck eggs are smaller, narrower and have a yellow cast to them. wood duck eggs on the Pennsylvania study area and 27 mallards and 3 wood ducks using structures on the Ontario site (Figure 1). On both areas, mallard occupancy has increased each year since 2006. While nest success rates for both species in Pennsylvania fluctuate, mallard success was better in 2008 than the previous two years. Mallard success has decreased each year in Ontario, while wood duck success has increased each year (Figures 2 and 3). The primary cause of nest failure in Pennsylvania was nest abandonment, and two nests were predated, one by grackles and the other unknown. In Ontario the majority of nest failures were due to predation by crows. During the three years of the study more than 130 mallard nests were initiated producing approximately 900 ducklings. Some of the coolest information resulting from this study is the data on philopatry and homing. In 2008, 87 percent of the hens that returned to nest structures on the PA study site nested in either the same structure or an adjacent one. At the very least, 53 percent of the hens in Ontario did the same, but that number is probably low because predation made it difficult to assess. In 2007, 313 mallards hatched from structures on the two study sites, 251 of them were web tagged, and in 2008 four of those web-tagged ducklings returned to OCTOBER 2008 nest in structures as adult hens. Three of the four nested in close proximity to where they were hatched. The fourth nested in the same cylinder she was hatched from the year prior, but only after her mother had successfully hatched out a clutch before her, earlier in the summer. The 170 invertebrate samples, habitat measurements and surrounding land use data are still being analyzed to see what variables influence site selection by mallards and wood ducks. This information will be useful to land managers in areas where waterfowl congregate and nest. Get Involved! Gather your friends this winter and make nest structures. Find hen house plans at www.deltawaterfowl.org or call Delta Waterfowl at 1-888-987-3695. Structures are easiest to erect when the water is frozen and can be walked upon. They should be placed by the first week of March, above the high water mark but not more than three feet above the high water mark. Avoid wetlands with large fluctuations in the water level. Tripod nests seem to be easier to move and adjust as water levels fluctuate. Sometimes pole structures sink continuously into mucky soil and are nearly impossible to move. 13
http://www.deltawaterfowl.org

Table of Contents for the Digital Edition of Pennsylvania Game News - October 2008

Pennsylvania Game News - October 2008
Life & Times of the Whitetail
Contents
The Essence of Whitetails
Hunting for a Greater Good
What a Story to Tell
Three Birds, Four Shells, One Grouse
The Sandhill Crane Incidents
Nevada Grouse
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 - October 2008 - Pennsylvania Game News - October 2008
Pennsylvania Game News - October 2008 - Cover2
Pennsylvania Game News - October 2008 - Blowin1
Pennsylvania Game News - October 2008 - Blowin2
Pennsylvania Game News - October 2008 - Life & Times of the Whitetail
Pennsylvania Game News - October 2008 - Contents
Pennsylvania Game News - October 2008 - The Essence of Whitetails
Pennsylvania Game News - October 2008 - 4
Pennsylvania Game News - October 2008 - 5
Pennsylvania Game News - October 2008 - 6
Pennsylvania Game News - October 2008 - Hunting for a Greater Good
Pennsylvania Game News - October 2008 - 8
Pennsylvania Game News - October 2008 - 9
Pennsylvania Game News - October 2008 - 10
Pennsylvania Game News - October 2008 - 11
Pennsylvania Game News - October 2008 - 12
Pennsylvania Game News - October 2008 - 13
Pennsylvania Game News - October 2008 - What a Story to Tell
Pennsylvania Game News - October 2008 - 15
Pennsylvania Game News - October 2008 - 16
Pennsylvania Game News - October 2008 - 17
Pennsylvania Game News - October 2008 - Three Birds, Four Shells, One Grouse
Pennsylvania Game News - October 2008 - 19
Pennsylvania Game News - October 2008 - 20
Pennsylvania Game News - October 2008 - The Sandhill Crane Incidents
Pennsylvania Game News - October 2008 - 22
Pennsylvania Game News - October 2008 - 23
Pennsylvania Game News - October 2008 - 24
Pennsylvania Game News - October 2008 - 25
Pennsylvania Game News - October 2008 - 26
Pennsylvania Game News - October 2008 - Nevada Grouse
Pennsylvania Game News - October 2008 - 28
Pennsylvania Game News - October 2008 - Field Notes
Pennsylvania Game News - October 2008 - 30
Pennsylvania Game News - October 2008 - 31
Pennsylvania Game News - October 2008 - 32
Pennsylvania Game News - October 2008 - 33
Pennsylvania Game News - October 2008 - Conservation News
Pennsylvania Game News - October 2008 - 35
Pennsylvania Game News - October 2008 - 36
Pennsylvania Game News - October 2008 - 37
Pennsylvania Game News - October 2008 - 38
Pennsylvania Game News - October 2008 - 39
Pennsylvania Game News - October 2008 - 40
Pennsylvania Game News - October 2008 - 41
Pennsylvania Game News - October 2008 - 42
Pennsylvania Game News - October 2008 - 43
Pennsylvania Game News - October 2008 - 44
Pennsylvania Game News - October 2008 - 45
Pennsylvania Game News - October 2008 - Off the Wire
Pennsylvania Game News - October 2008 - Another View
Pennsylvania Game News - October 2008 - 48
Pennsylvania Game News - October 2008 - 49
Pennsylvania Game News - October 2008 - The Naturalist's Eye
Pennsylvania Game News - October 2008 - 51
Pennsylvania Game News - October 2008 - 52
Pennsylvania Game News - October 2008 - 53
Pennsylvania Game News - October 2008 - Fun Game
Pennsylvania Game News - October 2008 - Straight from the Bowstring
Pennsylvania Game News - October 2008 - 56
Pennsylvania Game News - October 2008 - 57
Pennsylvania Game News - October 2008 - 58
Pennsylvania Game News - October 2008 - 59
Pennsylvania Game News - October 2008 - 60
Pennsylvania Game News - October 2008 - Lock, Stock & Barrel
Pennsylvania Game News - October 2008 - 62
Pennsylvania Game News - October 2008 - 63
Pennsylvania Game News - October 2008 - Crossings
Pennsylvania Game News - October 2008 - Cover3
Pennsylvania Game News - October 2008 - Cover4
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