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Appendix 4. Additional comparisons of estimated trend among species and data distributions. Figure A4.1.

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Appendix 4. Additional comparisons of estimated trend among species and data distributions.

Figure A4.1.

Scatter plots with loess smooth, showing estimated trend for each of 100 datasets simulated to represent a commonly detected species (e.g., Northern Harrier), a rarely detected species with zero-inflated counts (e.g., Peregrine Falcon) and a super-flocking species with highly over- dispersed counts (e.g., Broad-winged Hawk). Results are shown for trends estimated using hourly, daily and annual migration counts, and assuming a negative binomial (NB), zero-inflated NB (ZINB; hourly and daily data only), or Poisson (POIS) distribution of counts. The solid grey horizontal line depicts the true, simulated trend of -3.6%year-1.

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