Stratum-level Trends

Partners in Flight Physiographic Region
Regional Population Trajectory Display


This part of the Home Page allows you to define a species and a region, and the Home Page will produce a graph of annual indices of abundance and population trajectory for that species and region. This is experimental, so exercise caution in reviewing the results. For more information about how these indices are calculated, click on the Help File

Please note: Not all species are found in all regions. If data are not available for the species and region you select, you will get an "error opening" message.

As always, read the NBS Data Liability Disclaimer, given below.

Please select the species of interest from this list:

Here is a list of the new PIF strata .
Please select the region of interest:

Select COLOR or BLACK & WHITE graph

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NBS Data Liability Disclaimer

Although these data have been processed successfully on a computer system at the National Biological Service, no warranty expressed or implied is made regarding the accuracy or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data. It is strongly recommended that these data are directly acquired from a National Biological Service server, and not indirectly through other sources which may have changed the data in some way. It is also strongly recommended that careful attention be paid to the contents of the metadata file associated with these data. The National Biological Service shall not be held liable for improper or incorrect use of the data described and/or contained herein.

So, these data are provided "as is" and without any express or implied warranties, including, without limitation, the implied warranties of merchantability and fitness for a particular purpose. Also, use of trade names or commercial products in this home page is solely for the purpose of providing specific information, and does not imply recommendation or endorsement by the U.S. Government.