California Department of Fish and Wildlife

BIOS Tutorial: Central Sierra Birds Study


Analyzing Bird Point Count Data, Central Sierra Birds Study

In the BIOS Mapviewer:

  • First, open the BIOS Data Catalog by clicking the "Add BIOS Layers" tool (1).
  • Then, filter the list of Available Layers by selecting the "Layer Name" filter field (2) and entering the search term "central sierra" in the Search Term box (3).
  • Add the filter (4) and then check the "Central Sierra Hardwood Study - Birds" item (5) to add it to the "Checked Layers" box on the right.
  • Then click the "Add Checked Layers to Map" button (6) to add this layer to the map.

Back in the map:

  • Click the checkbox next to the added layer name to turn it on (7).
  • Click on the layer name text to make it the "Active Layer".
  • Finally, click the "Refresh Map" button to reflect your changes.

Next, to get information about a particular point count:

  • Using the "Zoom" tool (8) and anchoring with the mouse button, draw a zoom box about the size shown at (9).
  • Then, using the "Identify" tool (10) , click on a point count (study plot) location (11). Notice this action returns information in the bottom panel of the viewer (12) associated with the selected or "identified" point, including the species detected at that point and basic statistics relating to abundance.

The final step in this analysis example is determining species occurrence by point count (study plot) location.

  • Select the "Attribute query" tool (13) which will open the attribute query dialog box.
  • Clear query parameters from the last query by clicking on the "Clear" button below the left query panel.
  • Construct the query by selecting (double-clicking) "Common name" from the left query panel (14), the "=" operator from the center query panel (15), and the desired species (in this example "Pacific-slope flycatcher") from the right query panel (16).
  • Execute the query (17) and note the results on both the map (18) and in the query results panel.