Wildlife Specialist report
Wildlife Specialist report
Wildlife Specialist report
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Hairy Woodpecker (Management Indicator Species Representative of Ponderosa<br />
Pine and Mixed Conifer Snag Component) - The Hairy Woodpecker is an indicator of<br />
high seral stage ponderosa pine and mixed conifer because the older age classes within<br />
these vegetation types provide snags and an abundance of insects. The Hairy<br />
Woodpecker uses tree cavities for roosting and winter cover. Overall, the woodpecker<br />
appears to be minimally impacted by forest fragmentation, although a few studies have<br />
<strong>report</strong>ed a decline in numbers as forest patch size decreases. The presence of suitable<br />
cavity trees is a more important consideration (Bushman and Therre, 1988). It nests in<br />
holes dug mostly by the male in live or dead trees or shrubs, at an average height of 29.5<br />
feet (9 meters) above ground. In most areas, it favors dying parts of live trees, especially<br />
where fungal heart rot has softened the heartwood. Limiting factors for the Hairy<br />
Woodpecker include predation and habitat modification. Snags (25cm or more in DBH)<br />
and an average of five snags/hectare are assumed optimal for woodpecker reproduction,<br />
but may not be adequate for foraging. With over 1,341,662 acres of ponderosa pine, and<br />
mixed conifer vegetation on the Gila National Forest, snag habitat is abundant for this<br />
species. Again the Hairy Woodpecker is the focal species for this group/guild of species.<br />
The analysis indicators for direct and disturbance effects are described above.<br />
Cavity Nester Summary:<br />
Table 63 list road associated and motorized trail/ORV factors related to cavity nester<br />
focal species that represent this group; analysis factors based on the analysis factor<br />
discussed above; and the indicator that will be used to compare the different levels of<br />
affect between the different alternatives.<br />
Table 63:<br />
Focal<br />
Group<br />
Cavity<br />
Nesters<br />
Road Associated Motorized Trail/ORV Combined Analysis Analysis<br />
Factors¹<br />
Associated Factors Factors<br />
Indicator<br />
Nesting Loss Nesting Loss Harvest/Direct Effects Miles<br />
Disturbance, Displacement,<br />
Avoidance, Harassment<br />
Disturbance, Displacement,<br />
Avoidance, Harassment<br />
Disturbance/Indirect<br />
Effects<br />
Disturbance Zone<br />
Summarized In Acres<br />
Table 64 summarizes the harvest indicator, disturbance indicator, and analysis area that<br />
will be used to analyze the effects of the different alternatives to cavity nesters.<br />
Table 64:<br />
Focal Species Motorized Activity Harvest<br />
Hairy<br />
Woodpecker<br />
Disturbance<br />
Analysis<br />
Indicator<br />
Zone<br />
Area<br />
Motorized Trail/ORV Use Route Miles 60m Ponderosa Pine<br />
Mixed Conifer<br />
90