Explore the data found in 2019 IMBCR State Reports

To help better understand potential uses of the Rocky Mountain Avian Data Center, we’ve put together a query to illustrate how the database can be used and act as a gateway to exploring it.

In 2019, PLJV used IMBCR grids to evaluate how grassland birds respond to increasing percent cover of shrubs, particularly mesquite. Preliminary results of this work and results from the baseline IMBCR monitoring study are available in the 2019 state reports.

As an example, we query the Rocky Mountain Avian Data Center for these results. Grids were established in five percent cover categories; under Individual Stratum we selected PLJV-MSQ-HI, PLJV-MSQ-MH, PLJV-MSQ-MI, PLJV-MSQ-ML, PLJV-MSQ-LO. Then we searched for two species: Cassin’s Sparrow and Horned Lark.

Run the query and explore the database >>

If you’re new to the database, see our step-by-step instructions and explanations below.

  1. To run the query, accept the disclaimer and then click the red ‘Run Query’ button at the top of the page to see the results.
  2. After clicking on ‘Run Query’, the map will zoom into the area being queried. The blue circles are the grids that are sampled and the pink dots inside indicate the bird species has been detected at that grid.
  3. The second tab has the results for the occupancy analysis. Occupancy (Psi) is a metric that tells us probability that a species is occupying that location. Fewer detections of an individual species are required to calculate this metric making it useful for rare or difficult to detect species. If we understand the occupancy, we could design studies that target areas where occupancy is high to learn more.
  4. The third tab has the results for the density (D) analysis and also an estimate of population size (N). Because IMBCR uses distance sampling, we can correct density (and occupancy) for detection. Density is reported as birds/km2.
  5. The fourth tab has the list of species, the number of times that species was detected and the number of grids sampled in the queried surveys.
  6. The initial table has all detections lumped together but, if we were interested in seeing the counts by individual stratum, we can do that by selecting stratum in the drop-down menu in the upper lefthand corner.

For help using IMBCR data in conservation planning, contact PLJV’s Conservation Science Director Anne Bartuszevige.

Posted: June 11, 2020