- Algeria
- Baha, 1997; Zeriri et al., 2013
- Bulgaria
- Zicsi and Csuzdi, 1986b; Stojanovic et al., 2012
- Canada
- Ontario: Reynolds, 1977; Quebec: Reynolds, 1975e
- Denmark
- Blakemore, 2007.
- Finland
- Blakemore, 2007.
- France
- Bouche, 1972
- Greece
- Szederjesi and Csuzdi, 2012
- Greenland
- Blakemore, 2007b
- Guatemala
- Brown and Fragoso, 2007
- Iceland
- Blakemore, 2007b
- Madeira
- Talavera, 1996
- New Zealand
- Lee, 1959
- Norway
- Sveistrup et al., 1997; Hansen and Engelstad, 1999; Bakken et al., 2006; Blakemore, 2007; Pommeresche et al., 2009b.
- Romania
- Brinzea, 2011; Pop V.V., 2012
- Russia
- Perel, 1979; Perel-Vsevolodova, 1997; Blakemore, 2007c
- Serbia
- Milutinovic, 2010
- Sweden
- Blakemore, 2007.
- Turkey
- Omodeo and Rota, 1989
- United Kingdom
- Sims and Gerard, 1985, 1999; Scotland: Carpenter, 2011
- United States
- Alaska: Bowser et al., 2013; Idaho: James, 2000; Oregon: James, 2000; Washington: James, 2000
- Uruguay
- Grosso and Brown, 2007
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Data are not exhaustive. The database is permanently a work in progress.