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  3. > Recovery Strategy for the Loggerhead Shrike, excubitorides subspecies (Lanius ludovicianus excubitorides) in Canada [Proposed] - 2014
Table 3. Threat Assessment Table.
General Threat Level of Concern[1] Extent Occurrence Frequency Severity[2] Causal Certainty[3]
Pollution
Air pollution High Widespread Current & Anticipated Continuous High High
Habitat Loss or Degradation
Tree harvesting and forestry activities High Widespread Current & Anticipated Recurrent High High
Road construction Medium Widespread Current & Anticipated One-time High Medium
Housing/ cottage development Medium Unknown Anticipated One-time High Medium
Climate and Natural Disasters
Climate change Medium Widespread Current & Anticipated Recurrent Unknown Medium
Exotic Invasive or Introduced species
Herbivory Medium Localized Current & anticipated Continuous / Seasonal Medium Low

[1] Level of Concern: signifies that managing the threat is of (high, medium or low) concern for the recovery of the species, consistent with the population and distribution objectives. This criterion considers the assessment of all the information in the table).
[2] Severity: reflects the population-level effect (High: very large population-level effect, Moderate, Low, Unknown).
[3] Causal certainty: reflects the degree of evidence that is known for the threat (High: available evidence strongly links the threat to stresses on population viability; Medium: there is a correlation between the threat and population viability e.g. expert opinion; Low: the threat is assumed or plausible).

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Date Modified:
2014-08-08