You’ll now use the Select tool to extract the suitable locations.

To do so, expand the Extract toolset located in the Analysis Tools toolbox. Click and drag the Select tool into the ModelBuilder window. Note that the tool added will be called Select (2) as you have already added a Select tool.

Right-click the Select (2) tool element and click Open. Click the Input Features dropdown arrow and click the variable Singlepart Output.

You’ll put the final output inside your Habitat_Analysis geodatabase. Clear the default path and type “locations” for the value of the Output Feature Class parameter. The path to your current workspace will automatically be added when you click the next parameter in the dialog box.

Type the following expression for the value of the Expression parameter or click the browse button to the right of the Expression parameter and build the expression using the Query Builder dialog box.

"CLIMATE_ID" = 2 AND "Shape_Area" >= 1089000 OR "CLIMATE_ID" = 3 AND "Shape_Area" >= 2178000

Alternatively, browse in your operating system to query.txt located in your GP_Tutorial folder, copy the query, and paste it into the Expression parameter’s input box.

The expression extracts all areas where the climate zone is 1 or 2 (polygons with a CLIMATE_ID of 2) and the area of the vegetation patch is greater than or equal to 25 acres (1,089,000 square feet), or where the climate zone is 3 (polygons with a CLIMATE_ID of 3) and the area of the vegetation patch is greater than or equal to 50 acres (2,178,000 square feet).

Click OK.

Click Auto Layout, then Full Extent to display all the model elements in their default position in the display window. Right-click the element locations and click Rename. Type “Output Habitat Locations”, then click OK. Right-click the element Output Habitat Locations and click Add To Display. Right-click the Select (2) tool element and click Run.

The resulting feature class shows areas capable of supporting the California gnatcatcher based on the criteria set. Potential patches contain suitable vegetation types that are far enough away from roads, where the elevation is lower than 250 m, and where the slope of the terrain is less than 40 percent. The size of the vegetation patch is greater than or equal to 25 acres in climate zones 1 and 2 and greater than or equal to 50 acres in climate zone 3.

Click all results except locations in the table of contents— press the Ctrl key to select more than one layer—right-click, and click Remove.