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OCCURRENCE CLASSIFICATION CRITERIA <br />The following are categories used [o classify species occurrence on a county basis for the <br />purposes of the NDIS project. <br />CATEGORY DEFINITION <br />Known to Occur Species orsub-species known to occur in the county from actual records or <br /> sightings. <br />Likely io Occur No known records or sightings exist for the county, but the species is <br /> suspected to occur because of its proximity to adjacent counties having <br /> known records or the availabiiiry of suitable habitats. <br />SPECIES CLASSIFICATIONS FOR ABUNDANCE <br />The following are the abundance classes which will be used to categorize species abundance on <br />a county basis for the purposes of the NDIS project. The categories are intended to be objective <br />in the sense that specific numbers of individuals or groups are used to define the abundance <br />class. <br />AMPHIBIANS <br />CATEGORY DEFINITION <br />Common 10 or more individual adults or 4 or more breeding aggregations can usually <br /> be observed, and the species can usually be found in 75-100% of areas <br /> surveyed in a single day by standard techniques and in appropriate seasons <br /> and habitats. <br />Fairly Common 5 to ]0 individual adults or 2 to 3 breeding aggregations can usually be <br /> observed, and the species can usually be found in 50-75% of areas surveyed <br /> in a single day by standard techniques and in appropriate seasons and <br /> habitats. <br />