Family: Lady Beetles (Coccinellidae)
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There are two known Adalia species: two-spotted and ten-spotted lady beetles. Both are found in Europe. Two-spotted is the only one found in North America.
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Adalia bipunctata is the only Adalia species in North America and was once considered the second most common lady beetle. Surveys since the 1980s indicate a population decline for this species, as with several other native lady beetles (Harmon et al 2007 and Cornell University 2013). ?Stephens and Losey (2003) stated that this species has rarely been collected in recent years.
Declines were first noted during the 1980s. The Lost Ladybug Project (Cornell University 2013) reported A. bipunctata at six sites.
Abundant data are not available, but this species was once considered common and found throughout New York. The population appears to be lower now than in the early to mid-1900s. The decline went largely unnoticed until the 1980s. Reasons for the decline are unknown, but could be because of multiple factors including habitat loss, competition with non-native species, insecticide use, pathogens, and parasites. Most recent observations indicate a range reduction New York. The species has been found in western and northern parts of the state (Cornell University 2013).