The Nonindigenous Occurrences section of the NAS species profiles has a new structure. The section is now dynamically updated from the NAS database to ensure that it contains the most current and accurate information. Occurrences are summarized in Table 1, alphabetically by state, with years of earliest and most recent observations, and the tally and names of drainages where the species was observed. The table contains hyperlinks to collections tables of specimens based on the states, years, and drainages selected. References to specimens that were not obtained through sighting reports and personal communications are found through the hyperlink in the Table 1 caption or through the individual specimens linked in the collections tables.

Pelophylax nigromaculatus
Pelophylax nigromaculatus
(Black-spotted Frog)

Copyright Info
Pelophylax nigromaculatus (Hallowell, 1861)

Common name: Black-spotted Frog

Taxonomy: available through www.itis.govITIS logo

Native Range: Pelophylax nigromaculatus is known from the Russian Far East (from Evreiskaya Autonomous Province to the lower reaches of the Amur River), central, northern and north-eastern China, the Democratic People's Republic of Korea, and Japan (Kuzmin et al., 2004).

Hydrologic Unit Codes (HUCs) Explained
Interactive maps: Point Distribution Maps

Nonindigenous Occurrences: A single individual was collected in the Namo River in Guam in 2004 (Walsh, Personal Communication). Another single individual was collected in the Sigua River in Guam in 2006 (Walsh, Personal Communication). Specimens were collected from Oahu, Hawaii in 1895 and 1938 (McKeown, 1996).

Table 1. States with nonindigenous occurrences, the earliest and latest observations in each state, and the tally and names of HUCs with observations†. Names and dates are hyperlinked to their relevant specimen records. The list of references for all nonindigenous occurrences of Pelophylax nigromaculatus are found here.

StateFirst ObservedLast ObservedTotal HUCs with observations†HUCs with observations†

Table last updated 5/28/2024

† Populations may not be currently present.

Means of Introduction: Unknown in Guam. Stocked for biocontrol in Hawaii.

Status: Unknown.

Impact of Introduction: The impacts of this species are currently unknown, as no studies have been done to determine how it has affected ecosystems in the invaded range. The absence of data does not equate to lack of effects. It does, however, mean that research is required to evaluate effects before conclusions can be made.

References: (click for full references)

McKeown, S. 1996. A field guide to reptiles and amphibians in the Hawaiian Islands. Diamond Head Publishing, Inc., Los Osos, California.

Kuzman, S., I. Maslova, B. Tuniyev, M. Matsui, L. Pipeng, and Y. Kaneko. 2004. Pelophylax nigromaculatus. The IUCN Red List of Threatened Species. Version 2015.2. http://www.iucnredlist.org. Downloaded on 23 July 2015.

Author: Powell, R.S.

Revision Date: 5/16/2018

Citation Information:
Powell, R.S., 2024, Pelophylax nigromaculatus (Hallowell, 1861): U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov/queries/FactSheet.aspx?speciesID=73, Revision Date: 5/16/2018, Access Date: 5/29/2024

This information is preliminary or provisional and is subject to revision. It is being provided to meet the need for timely best science. The information has not received final approval by the U.S. Geological Survey (USGS) and is provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the information.


The data represented on this site vary in accuracy, scale, completeness, extent of coverage and origin. It is the user's responsibility to use these data consistent with their intended purpose and within stated limitations. We highly recommend reviewing metadata files prior to interpreting these data.

Citation information: U.S. Geological Survey. [2024]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [5/29/2024].

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