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BLACK-CROWNED NIGHT-HERON
The Black-crowned Night-Heron is an uncommon to rare breeder in the CW Region. This species has declined dramatically during the past century. Some proposed reasons for their declines in our area include disturbance, filling in of marshes, and competition with cormorants and other waders. The BCN Survey does not adequately monitor wetlands. Retaining large tracts of willows and maintaining hemi-marsh habitat may help this species where it still breeds. . Photo: © Heather Secker |
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Conservation Status | # of Points | # of Records | Credibility | Annual Change | Pct. Error | ||||||||||
Endangered | 17 | 67 | Poor | +27% | +/-47% | ||||||||||
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IL-ENDGR |
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Uncertain |
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Technical Details - Graph |
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Goodness of Fit Chi-Square: p= 0.1211 |
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Passes |
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model fits if p >0.05 (model estimate is not significantly dif. from observed counts) |
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Copyright © 2008 Audubon - Chicago Region & Bird Conservation Network | ||||||
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