Beetles
Carabidae
Black Clock
Pterostichus madidus
(Fabricius, 1775)
National assessment
Occurrences
621 since 2000
1,272 all time
Occupied 1 km squares
163 since 2000
275 all time
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Occurrence since 1950
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"colors": ["teal"],
"points": [["Occurrences","1950",0],["Occurrences","1951",1],["Occurrences","1952",0],["Occurrences","1953",0],["Occurrences","1954",0],["Occurrences","1955",0],["Occurrences","1956",1],["Occurrences","1957",0],["Occurrences","1958",0],["Occurrences","1959",0],["Occurrences","1960",0],["Occurrences","1961",0],["Occurrences","1962",0],["Occurrences","1963",0],["Occurrences","1964",0],["Occurrences","1965",0],["Occurrences","1966",0],["Occurrences","1967",1],["Occurrences","1968",2],["Occurrences","1969",2],["Occurrences","1970",0],["Occurrences","1971",14],["Occurrences","1972",0],["Occurrences","1973",4],["Occurrences","1974",10],["Occurrences","1975",10],["Occurrences","1976",0],["Occurrences","1977",5],["Occurrences","1978",0],["Occurrences","1979",0],["Occurrences","1980",3],["Occurrences","1981",6],["Occurrences","1982",0],["Occurrences","1983",2],["Occurrences","1984",19],["Occurrences","1985",4],["Occurrences","1986",7],["Occurrences","1987",20],["Occurrences","1988",8],["Occurrences","1989",19],["Occurrences","1990",5],["Occurrences","1991",8],["Occurrences","1992",24],["Occurrences","1993",21],["Occurrences","1994",81],["Occurrences","1995",158],["Occurrences","1996",56],["Occurrences","1997",13],["Occurrences","1998",40],["Occurrences","1999",80],["Occurrences","2000",42],["Occurrences","2001",25],["Occurrences","2002",34],["Occurrences","2003",16],["Occurrences","2004",15],["Occurrences","2005",16],["Occurrences","2006",13],["Occurrences","2007",10],["Occurrences","2008",20],["Occurrences","2009",8],["Occurrences","2010",11],["Occurrences","2011",16],["Occurrences","2012",16],["Occurrences","2013",11],["Occurrences","2014",46],["Occurrences","2015",136],["Occurrences","2016",70],["Occurrences","2017",30],["Occurrences","2018",28],["Occurrences","2019",40],["Occurrences","2020",4],["Occurrences","2021",11],["Occurrences","2022",1],["Occurrences","2023",0],["Occurrences","2024",2],["Occurrences","2025",0],["Occupied 1km squares","1950",0],["Occupied 1km squares","1951",1],["Occupied 1km squares","1952",0],["Occupied 1km squares","1953",0],["Occupied 1km squares","1954",0],["Occupied 1km squares","1955",0],["Occupied 1km squares","1956",1],["Occupied 1km squares","1957",0],["Occupied 1km squares","1958",0],["Occupied 1km squares","1959",0],["Occupied 1km squares","1960",0],["Occupied 1km squares","1961",0],["Occupied 1km squares","1962",0],["Occupied 1km squares","1963",0],["Occupied 1km squares","1964",0],["Occupied 1km squares","1965",0],["Occupied 1km squares","1966",0],["Occupied 1km squares","1967",1],["Occupied 1km squares","1968",2],["Occupied 1km squares","1969",1],["Occupied 1km squares","1970",0],["Occupied 1km squares","1971",8],["Occupied 1km squares","1972",0],["Occupied 1km squares","1973",2],["Occupied 1km squares","1974",4],["Occupied 1km squares","1975",4],["Occupied 1km squares","1976",0],["Occupied 1km squares","1977",3],["Occupied 1km squares","1978",0],["Occupied 1km squares","1979",0],["Occupied 1km squares","1980",3],["Occupied 1km squares","1981",2],["Occupied 1km squares","1982",0],["Occupied 1km squares","1983",1],["Occupied 1km squares","1984",8],["Occupied 1km squares","1985",3],["Occupied 1km squares","1986",4],["Occupied 1km squares","1987",9],["Occupied 1km squares","1988",3],["Occupied 1km squares","1989",7],["Occupied 1km squares","1990",2],["Occupied 1km squares","1991",2],["Occupied 1km squares","1992",6],["Occupied 1km squares","1993",11],["Occupied 1km squares","1994",27],["Occupied 1km squares","1995",39],["Occupied 1km squares","1996",26],["Occupied 1km squares","1997",5],["Occupied 1km squares","1998",13],["Occupied 1km squares","1999",27],["Occupied 1km squares","2000",21],["Occupied 1km squares","2001",12],["Occupied 1km squares","2002",10],["Occupied 1km squares","2003",4],["Occupied 1km squares","2004",6],["Occupied 1km squares","2005",4],["Occupied 1km squares","2006",5],["Occupied 1km squares","2007",5],["Occupied 1km squares","2008",9],["Occupied 1km squares","2009",4],["Occupied 1km squares","2010",3],["Occupied 1km squares","2011",7],["Occupied 1km squares","2012",8],["Occupied 1km squares","2013",5],["Occupied 1km squares","2014",12],["Occupied 1km squares","2015",22],["Occupied 1km squares","2016",22],["Occupied 1km squares","2017",11],["Occupied 1km squares","2018",10],["Occupied 1km squares","2019",23],["Occupied 1km squares","2020",2],["Occupied 1km squares","2021",9],["Occupied 1km squares","2022",1],["Occupied 1km squares","2023",0],["Occupied 1km squares","2024",2],["Occupied 1km squares","2025",0]]
}
This chart should not be relied upon for an indication of species status as variations in recording effort can heavily affect the count of occurrences and occupied 1km squares.
Biological Records Centre. Derek Lott Coleoptera Dataset. Licenced under CC-BY https://creativecommons.org/licenses/by/4.0.
Biological Records Centre. Ground Beetle Recording Scheme - data verified via iRecord. Licenced under CC-BY https://creativecommons.org/licenses/by/4.0.
Lincolnshire Biodiversity Partnership (now the GLNP).
Lincolnshire Wildlife Trust.
Natural Resources Wales. Welsh Invertebrate Database (WID). Licenced under OGL http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3.