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Researchers at Audubon Greenwich’s Quaker Ridge hawk watch site are alarmed that they’ve seen only 8,025 hawks over the fall migration season this year, the second lowest total in more than three decades of collecting data. In years past, they have seen as many as 30,000 hawks in a single day, said Ryan MacLean, the official hawk counter at the site. “We have 31 years of data, and unfortunately out of 31 years, this is our second lowest on record,” MacLean said.

Environmental risk assessment approaches used by regulatory agencies around the world were developed on the basis of a methodology published by the National Academy of Sciences. For the hazard characterization step, it is generally accepted that once detectable, a response of an organism to a toxicant increases proportionally with the level of exposure until reaching an upper-limit or maximal-effect level (Emax) beyond which increasing toxicant dose will not increase the response (known as a monotonic dose-response).

Butterfly numbers are suffering a "shock collapse", a study shows today as conservationists raise concern farm pesticides are causing the worst population fall in six years. Despite a warm summer that would normally help them thrive, the majority of species studied in the annual Big Butterfly Count saw populations fall. Some saw their worst numbers since the citizen science project began in 2010.

Michael McCarthy has published a powerful, sensitive new book, The Moth Snowstorm: Nature and Joy, a book about the wonders of the natural world and about its decline. In a chapter called “The Great Thinning,” McCarthy, a highly regarded British environmental journalist, notes the difference between extinction at the national level and extinction at the local level. He observes that among birds “there were only two national extinctions in Britain in the post-war period,” the red-backed shrike and the wryneck.

Neonicotinoids are the most widely used class of insecticides worldwide, but patterns of their use in the U.S. are poorly documented, constraining attempts to understand their role in pest management and potential nontarget effects. We synthesized publicly available data to estimate and interpret trends in neonicotinoid use since their introduction in 1994, with a special focus on seed treatments, a major use not captured by the national pesticide-use survey.

Following recent updates proposed by BirdLife International and further updates across Europe gathered in the context of a continent-wide study of the migration strategy of the species, we propose here an update of national population sizes and associated recent trends of the Ortolan Bunting (Emberiza hortulana). Previous estimates for the period 1999-2002 reported 5,200,000 to 16,000,000 breeding pairs, for an area extending east to European Russia, and south to the Caucasus and Turkey.

The apparent stability of the bearded reedling (Panurus biarmicus) in Spanish inland wetlands contrasts with its threatened status in Spanish coastal wetlands. The species has already disappeared from some coastal areas in Catalonia and its situation is critical in the region of Valencia. In 2013 we studied the breeding populations in three wetlands in Valencia using two methods: census by exhaustive search of individuals (territory mapping) and distance sampling using line transects.

Autism Spectrum Disorder (ASD) affects about 1 in 68 children in the United States, and a combination of genetic and environmental factors, along with complications during pregnancy have been associated with ASD diagnoses. A new study from the National Institute of Environmental Health Services has strengthened the link between prenatal exposure to agricultural pesticides and ASD. The study’s findings have been published in the journal Environmental Health Perspectives.

Due to their high water solubility and diversity of application methods the movement of neonicotinoid insecticides into surface and ground waters has been of increasing concern.