16 Montana
In 2023, we had complete survey coverage across the state of Montana (Figure 16.1).
16.1 Montana Statewide: Total
Montana Statewide: Total
We obtained results for Montana Statewide: Total by compiling and jointly analyzing data from 30 strata.
Field technicians completed 178 of 182 planned surveys (98%) in 2023. Technicians conducted 2184 point counts within the 178 surveyed grid cells between May 22 and July 16. They detected 216 bird species, including 37 priority species.
Bird Conservancy estimated densities and population sizes for 224 species that were detected in any year during which surveys were conducted, 43 of which are priority species. The data yielded robust density estimates (CV < 50%) for 125 species.
Bird Conservancy estimated the proportion of 1 km² grid cells occupied (Ψ, Psi) throughout Montana Statewide: Total for 232 species that were detected in any year during which surveys were conducted, 45 of which are priority species. The data yielded robust occupancy estimates (CV < 50%) for 144 species.
16.2 All Other Lands in Montana
All Other Lands in Montana
We obtained results for All Other Lands in Montana by compiling and jointly analyzing data from three strata.
Field technicians completed 25 of 26 planned surveys (96%) in 2023. Technicians conducted 322 point counts within the 25 surveyed grid cells between May 24 and July 13. They detected 146 bird species, including 26 priority species.
Bird Conservancy estimated densities and population sizes for 179 species that were detected in any year during which surveys were conducted, 36 of which are priority species. The data yielded robust density estimates (CV < 50%) for 57 species.
Bird Conservancy estimated the proportion of 1 km² grid cells occupied (Ψ, Psi) throughout All Other Lands in Montana for 180 species that were detected in any year during which surveys were conducted, 35 of which are priority species. The data yielded robust occupancy estimates (CV < 50%) for 73 species.
16.3 Montana BCR 10
Montana BCR 10: Total
We obtained results for Montana BCR 10: Total by compiling and jointly analyzing data from 21 strata.
Field technicians completed 118 of 119 planned surveys (99%) in 2023. Technicians conducted 1351 point counts within the 118 surveyed grid cells between May 28 and July 16. They detected 147 bird species, including 19 priority species.
Bird Conservancy estimated densities and population sizes for 194 species that were detected in any year during which surveys were conducted, 30 of which are priority species. The data yielded robust density estimates (CV < 50%) for 80 species.
Bird Conservancy estimated the proportion of 1 km² grid cells occupied (Ψ, Psi) throughout Montana BCR 10: Total for 201 species that were detected in any year during which surveys were conducted, 31 of which are priority species. The data yielded robust occupancy estimates (CV < 50%) for 90 species.
All Other Lands in Montana BCR 10
We obtained results for All Other Lands in Montana BCR 10 by compiling and analyzing data from one stratum.
Field technicians completed 7 of 8 planned surveys (88%) in 2023. Technicians conducted 75 point counts within the 7 surveyed grid cells between June 1 and July 10. They detected 88 bird species, including 13 priority species.
Bird Conservancy estimated densities and population sizes for 131 species that were detected in any year during which surveys were conducted, 16 of which are priority species. The data yielded robust density estimates (CV < 50%) for 15 species.
Bird Conservancy estimated the proportion of 1 km² grid cells occupied (Ψ, Psi) throughout All Other Lands in Montana BCR 10 for 133 species that were detected in any year during which surveys were conducted, 16 of which are priority species. The data yielded robust occupancy estimates (CV < 50%) for 15 species.
16.4 Montana BCR 11
Montana BCR 11: Total
We obtained results for Montana BCR 11: Total by compiling and jointly analyzing data from four strata.
Field technicians completed 31 of 33 planned surveys (94%) in 2023. Technicians conducted 434 point counts within the 31 surveyed grid cells between May 22 and July 9. They detected 111 bird species, including 20 priority species.
Bird Conservancy estimated densities and population sizes for 132 species that were detected in any year during which surveys were conducted, 23 of which are priority species. The data yielded robust density estimates (CV < 50%) for 32 species.
Bird Conservancy estimated the proportion of 1 km² grid cells occupied (Ψ, Psi) throughout Montana BCR 11: Total for 135 species that were detected in any year during which surveys were conducted, 24 of which are priority species. The data yielded robust occupancy estimates (CV < 50%) for 38 species.
All Other Lands in Montana BCR 11
We obtained results for All Other Lands in Montana BCR 11 by compiling and analyzing data from one stratum.
Field technicians completed all planned surveys (100%) in 2023. Technicians conducted 114 point counts within the 8 surveyed grid cells between May 27 and June 30. They detected 79 bird species, including 13 priority species.
Bird Conservancy estimated densities and population sizes for 119 species that were detected in any year during which surveys were conducted, 22 of which are priority species. The data yielded robust density estimates (CV < 50%) for 18 species.
Bird Conservancy estimated the proportion of 1 km² grid cells occupied (Ψ, Psi) throughout All Other Lands in Montana BCR 11 for 118 species that were detected in any year during which surveys were conducted, 21 of which are priority species. The data yielded robust occupancy estimates (CV < 50%) for 23 species.
16.5 Montana BCR 17
Montana BCR 17: Total
We obtained results for Montana BCR 17: Total by compiling and jointly analyzing data from five strata.
Field technicians completed 29 of 30 planned surveys (97%) in 2023. Technicians conducted 399 point counts within the 29 surveyed grid cells between May 23 and July 13. They detected 146 bird species, including 20 priority species.
Bird Conservancy estimated densities and population sizes for 180 species that were detected in any year during which surveys were conducted, 30 of which are priority species. The data yielded robust density estimates (CV < 50%) for 39 species.
Bird Conservancy estimated the proportion of 1 km² grid cells occupied (Ψ, Psi) throughout Montana BCR 17: Total for 183 species that were detected in any year during which surveys were conducted, 30 of which are priority species. The data yielded robust occupancy estimates (CV < 50%) for 45 species.
All Other Lands in Montana BCR 17
We obtained results for All Other Lands in Montana BCR 17 by compiling and analyzing data from one stratum.
Field technicians completed all planned surveys (100%) in 2023. Technicians conducted 133 point counts within the 10 surveyed grid cells between May 24 and July 13. They detected 91 bird species, including 16 priority species.
Bird Conservancy estimated densities and population sizes for 134 species that were detected in any year during which surveys were conducted, 21 of which are priority species. The data yielded robust density estimates (CV < 50%) for 21 species.
Bird Conservancy estimated the proportion of 1 km² grid cells occupied (Ψ, Psi) throughout All Other Lands in Montana BCR 17 for 135 species that were detected in any year during which surveys were conducted, 21 of which are priority species. The data yielded robust occupancy estimates (CV < 50%) for 21 species.