BLUE JAY | SPECIES INDEX | HOME |
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| Conservation Concern: NONE Population Trend: Substantial Decrease The Blue Jay is a common statewide breeder. Blue Jays often nest in woodlands, mixed forests, or forest edges with mast-producing trees (usually oaks). Nests may be placed in forks of trees or dense shrubs. BCN eBird data indicates that this species has decreased significantly. Also note, the significant drop between 2002 and 2003 which may be linked to the spread of West Nile Virus. |
Trend Level
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1997-2004 Trend Point Count Data |
1988-2004 Trend* All Observation Types |
![]() | ![]() *Data gathered using a assortment of sampling methods - for casual inferences only |
| Avg. Yearly Rate of Change: | The vertical axis numbers represent an index of the population change. Note that the scales may vary between graphs. | Avg. Yearly Rate of Change*: | ||
| -11% | -3% |
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| Technical Notes (1997-2004 Trend)
Download Table of All Observations
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| Project Affiliates and Sponsors: Copyright © 2005 Audubon - Chicago Region & Bird Conservation Network
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