The windshield phenomenon (or windscreen phenomenon) is the observation that fewer dead insects accumulate on the windshields and front bumpers of people's cars since the early 2000s. It has been attributed to a global decrease of insect populations caused by human activity, e.g. use of pesticides. [1]
As early as the 2000s it became a commonplace observation among drivers that after a long drive, windshields no longer had to be cleaned of numerous insects. [2] [3] [4] In 2016, Canadian naturalist John Acorn noted that the phenomenon had recently become a meme but questioned whether it is "reasonable to assume that windshields can tell us something about the overall numbers of insects" and also that "humans are notoriously bad at detecting trends". [5] The windshield phenomenon was discussed widely in 2017 after major publications and other media reported the topic of reductions of insect abundance during the last few decades. [6] Entomologists stated that they had noticed that they no longer had to clean their windshields frequently. [7] [8] [9]
A 20-year study measured the number of dead insects on car windshields on two stretches of road in Denmark from 1997 until 2017. Adjusted for variables such as time of day, date, temperature, and wind speed, the research found an 80% decrease of the number of insects. A parallel study using sweep nets and sticky plates in the same area correlated positively with the reduction of insects killed by cars. [10]
In 2004 the Royal Society for the Protection of Birds (RSPB) asked 40,000 motorists in the United Kingdom to attach a sticky PVC film to their number plate. One insect collided with the plate for every 8 kilometres (5 mi) driven. [2] [3] [4] [8] [11] No historical data was available for comparison in the UK. [12] A follow-up study by Kent Wildlife Trust in 2019 used the same methodology as the RSPB survey and resulted in 50% fewer impacts. The research also found that modern cars, with a more aerodynamic body shape, killed more insects than boxier vintage cars. [13] Another survey was conducted in 2021 by Kent Wildlife Trust and nature conservation charity Buglife, which showed the number of insects sampled on vehicle number plates in Kent decreased by 72% compared to the 2004 results. [14]
The Royal Society for the Protection of Birds (RSPB) is a charitable organisation registered in England and Wales and in Scotland. It was founded in 1889. It works to promote conservation and protection of birds and the wider environment through public awareness campaigns, petitions and through the operation of nature reserves throughout the United Kingdom.
Roadkill is a wild animal that has been killed by collision with motor vehicles. Wildlife-vehicle collisions (WVC) have increasingly been the topic of academic research to understand the causes, and how they can be mitigated.
A windscreen wiper or windshield wiper is a device used to remove rain, snow, ice, washer fluid, water, or other debris from a vehicle's front window. Almost all motor vehicles, including cars, trucks, buses, train locomotives, and watercraft with a cabin—and some aircraft—are equipped with one or more such wipers, which are usually a legal requirement.
Helpers at the nest is a term used in behavioural ecology and evolutionary biology to describe a social structure in which juveniles and sexually mature adolescents of either one or both sexes remain in association with their parents and help them raise subsequent broods or litters, instead of dispersing and beginning to reproduce themselves. This phenomenon was first studied in birds where it occurs most frequently, but it is also known in animals from many different groups including mammals and insects. It is a simple form of co-operative breeding. The effects of helpers usually amount to a net benefit, however, benefits are not uniformly distributed by all helpers nor across all species that exhibit this behaviour. There are multiple proposed explanations for the behaviour, but its variability and broad taxonomic occurrences result in simultaneously plausible theories.
A bird strike is a collision between an airborne animal and a moving vehicle. The term is also used for bird deaths resulting from collisions with structures, such as power lines, towers and wind turbines.
A fly-killing device is used for pest control of flying insects, such as houseflies, wasps, moths, gnats, and mosquitoes.
Wildlife management is the management process influencing interactions among and between wildlife, its habitats and people to achieve predefined impacts. It attempts to balance the needs of wildlife with the needs of people using the best available science. Wildlife management can include wildlife conservation, population control, gamekeeping, wildlife contraceptive and pest control. Wildlife management draws on disciplines such as mathematics, chemistry, biology, ecology, climatology and geography to gain the best results.
Sir John Hartley Lawton is a British ecologist, RSPB Vice President, President of the Yorkshire Wildlife Trust, President of The Institution of Environmental Sciences, Chairman of York Museums Trust and President of the York Ornithological Club.
A vehicle licence is issued by a motor registration authority in a jurisdiction in respect of a particular motor vehicle. A current licence is required for a motor vehicle to be legally permitted to be used or kept on a public road in the jurisdiction. Usually a licence is valid for one year and an annual licence fee is payable before a new one is issued.
Windshield washer fluid is a fluid for motor vehicles that is used in cleaning the windshield with the windshield wiper while the vehicle is being driven.
The tarnished plant bug (TPB), Lygus lineolaris, is a species of plant-feeding insect in the family Miridae. It has piercing-sucking mouthparts and has become a serious pest on small fruits and vegetables in North America. It is considered a highly polyphagous species and feeds on over half of all commercially grown crop plants, but favors cotton, alfalfa, beans, stone fruits, and conifer seedlings. A study done in southwestern Quebec, Canada has investigated the presence of L. lineolaris in a commercial vineyard. This study also indicated that weeds that grow from cultivation of crops serve as an important food source for L. lineolaris. This insect can be found across North America, from northern Canada to southern Mexico. Adults grow up to 6.5 mm in length, and are brown with accents of yellow, orange or red, with a light-colored "V" on the back (dorsal). The genome has recently been sequenced for the first time.
Insect biodiversity accounts for a large proportion of all biodiversity on the planet—over half of the estimated 1.5 million organism species described are classified as insects.
Defaunation is the global, local, or functional extinction of animal populations or species from ecological communities. The growth of the human population, combined with advances in harvesting technologies, has led to more intense and efficient exploitation of the environment. This has resulted in the depletion of large vertebrates from ecological communities, creating what has been termed "empty forest". Defaunation differs from extinction; it includes both the disappearance of species and declines in abundance. Defaunation effects were first implied at the Symposium of Plant-Animal Interactions at the University of Campinas, Brazil in 1988 in the context of Neotropical forests. Since then, the term has gained broader usage in conservation biology as a global phenomenon.
Driven grouse shooting is a field sport in the United Kingdom involving the shooting of red grouse. It is one of two forms of the sport, the other is walked-up shooting. Driven grouse shooting involves grouse being driven to fly over people with shotguns in fixed positions. In walked-up shooting the participants walk forward in a line and flush the birds as they go. Walked-up shooting is more physically demanding than a driven shoot and typically involves fewer birds being shot.
Downe Bank is a nature reserve owned and managed by the Kent Wildlife Trust in the North Downs, close to Downe in the London Borough of Bromley. It is a Site of Special Scientific Interest (SSSI) together with the neighbouring High Elms Country Park. Located close to Charles Darwin's home, Down House, it was one of his favourite places and helped to inspire his work.
Charles Gordon Hewitt was a Canadian economic entomologist and pioneer of conservation biology. He was appointed dominion entomologist of Canada in 1909. He helped in the development of the Destructive Insect and Pest Act of 1910, and implemented significant changes in the Department of Agriculture. He published several books on the subjects of biology and entomology, and helped to further the 1916 treaty between Canada and the United States for the protection of migratory birds.
Karen Suzanne Oberhauser is an American conservation biologist who specializies in monarch butterflies.
Biodiversity loss happens when plant or animal species disappear completely from Earth (extinction) or when there is a decrease or disappearance of species in a specific area. Biodiversity loss means that there is a reduction in biological diversity in a given area. The decrease can be temporary or permanent. It is temporary if the damage that led to the loss is reversible in time, for example through ecological restoration. If this is not possible, then the decrease is permanent. The cause of most of the biodiversity loss is, generally speaking, human activities that push the planetary boundaries too far. These activities include habitat destruction and land use intensification. Further problem areas are air and water pollution, over-exploitation, invasive species and climate change.
Insects are the most numerous and widespread class in the animal kingdom, accounting for up to 90% of all animal species. In the 2010s, reports emerged about the widespread decline in insect populations across multiple insect orders. The reported severity shocked many observers, even though there had been earlier findings of pollinator decline. There has also been anecdotal reports of greater insect abundance earlier in the 20th century. Many car drivers know this anecdotal evidence through the windscreen phenomenon, for example. Causes for the decline in insect population are similar to those driving other biodiversity loss. They include habitat destruction, such as intensive agriculture, the use of pesticides, introduced species, and – to a lesser degree and only for some regions – the effects of climate change. An additional cause that may be specific to insects is light pollution.
Trees A Crowd is a natural history podcast presented by actor David Oakes.