This data set can be used to identify a calving fawning site, which is a polygon feature that identifies an area to which a particular species habitually migrates to give birth.

Different Calving Fawning Site types collected by the Natural Resources Values Information System (NRVIS) include:

Supplementary tables can be used and are available for download from the additional documentation section. Supplementary look-up table descriptions are available in the data description document, which is available for download from the additional documentation section.