A pollinator is any animal that transfers pollen from an anther (pollen-producing organ) of a plant to the stigma (pollen-receiving organ) of another plant, fertilising the plant and allowing it to produce seeds. When we think about pollinators, we tend to just picture honeybees and bumblebees, but there are in fact lots of different types of pollinating insects.
Hoverflies are an important but often overlooked group: these are a type of fly, often brightly coloured, which are commonly mistaken for wasps or bees, although they are stingless.
Solitary bees are another group of valuable pollinators. Although honeybees and bumblebees live together in colonies, most bee species nest individually in burrows.
We love watching butterflies flit with their fabulous wings, but often forget about their nocturnal counterparts, moths. Both butterflies and moths play crucial roles as pollinators.
Many other insect groups, including wasps, beetles, flies and ants pollinate plants. Even birds and bats can be pollinators, particularly in tropical areas.
Scientists estimate over 80% of flowering plants, including human crops, rely on pollinators for their reproduction and survival. Learning how to protect pollinating insects is crucial not only for the natural world, but for ourselves.
Photo: Biodehio CC BY-SA 4.0, Wikimedia
Photo: Luis Fernández García CC BY-SA 4.0, Wikimedia
Pollinators in towns and cities
You might expect pollinators to struggle in inhospitable urban areas, but there is evidence of both costs and benefits to living in towns or cities. Some groups, especially bumblebees, thrive in urban gardens and allotments, particularly compared to rural farmland, where there is often high use of pesticides and few wildflowers. However, other groups, including hoverflies and moths, are more sensitive to the challenges of urban areas. Although there has been lots of work on how factors such as flower abundance and habitat type affect pollinators in towns and cities, we still don’t fully understand the impact of air pollution, a serious issue in busy urban areas.
Air pollution has a number of different effects on pollinators and the plants they visit for food