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Red Crossbill, percna subspecies


Recovery objectives and methods must be evaluated to assess their success. Three main factors should be used to evaluate the effectiveness of percna recovery: population status, threat status, and habitat status (Table 4). Additional evaluation tools will be written into future action plans.


Table 4. Tabular summary of performance measures to evaluate recovery objectives and methods

Factor Performance measure to evaluate success of carrying out the action Performance measure to evaluate the effect of the action
Population status

1.   Develop methods to assess population status.

2.   Determine static and rotating survey areas scattered across a range of forest stands.

3.   Assess effectiveness of monitoring program.

4.   Determine viable population goal using population viability analysis.

5.   Develop power analysis for detecting population increases/decreases.

Increases in current population size or productivity.
Threat status1.  Mitigate negative impacts to percna and percna habitat. Increases in current population size or productivity.
Habitat status

1.   Maintain representative habitat.

2.   Assess use of spatially predictive habitat models using GIS.

Increases in current population size or productivity.

6.1 Development of Action Plans

An action plan intended to address the initial objectives of this strategy and to fill in the many data gaps associated with this species will be developed within two years of the release of the recovery strategy.