Neonicotinoid exposure could be harming mammals

Picture of a white-tailed deer (Odocoileus virginianus) sniffing behind fawn's ears

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Deer study suggests the toxic effects of these pesticides may not be limited to insects

A study on captive deer in the US has shown for the first time that exposure to neonicotinoid pesticides – which have previously been blamed for harming bees – could have a detrimental effect on the health of a large mammal at environmentally relevant concentrations.