Pollinators keep ecosystems functioning at nearly every level, from the reproduction of wild plants to the food on your plate. About 90% of the world’s flowering plant species depend on animals to carry pollen between flowers, and roughly 35% of global food crops require animal pollination to produce a harvest. Without bees, butterflies, birds, bats, beetles, and other pollinators, most terrestrial ecosystems would unravel.
Most Flowering Plants Cannot Reproduce Without Them
Plants are rooted in place. They can’t move to find a mate, so they rely on pollinators to shuttle pollen from one flower to another. Calculations published in National Science Review, drawing from databases of more than 330,000 flowering plant species, found that 90% are animal-pollinated. Only about 10% rely on wind or water to spread their pollen. That makes animal pollination the dominant reproductive strategy in the plant kingdom, not a supplementary one.
When pollinators move pollen between different individual plants, they enable cross-pollination, which produces offspring with greater genetic variety. That variety is what allows plant populations to adapt to changing conditions like drought, new diseases, or shifting temperatures. Populations that lose access to diverse pollinators tend to become more genetically uniform and less resilient over time. In evolutionary terms, pollinator-driven reproduction has been a major engine of the stunning diversity of flowering plants on Earth.
They Underpin the Food Web
Pollination doesn’t just produce flowers. It produces the fruits, seeds, and nuts that feed a huge range of wildlife. Berry-producing shrubs, fruit trees, and seed-bearing wildflowers all depend on pollinators to set their crops. When pollinator populations drop, seed and fruit production declines with them, cutting off food supplies for birds, small mammals, and other animals further up the chain. The Ecological Society of America has noted that pollinator declines can disrupt entire natural food communities through this cascading effect.
Pollinators also help maintain the plant cover that provides shelter and nesting habitat for wildlife. Grasslands, meadows, and forest understories rich in pollinator-dependent plants offer structure and protection for insects, ground-nesting birds, and small mammals. Remove pollinators, and those plant communities thin out, taking the animals that depend on them along for the ride.
A Third of Your Diet Depends on Pollinators
The USDA estimates that one out of every three bites of food you eat exists because of animal pollinators. That includes obvious crops like apples, almonds, blueberries, and squash, but also less obvious ones like coffee and chocolate. Globally, pollination services contribute more than $800 billion in gross economic value each year.
The nutritional stakes are even more striking than the economic ones. Pollinator-dependent crops supply more than 90% of the world’s available vitamin C, primarily from citrus and other fruits. They provide over 70% of vitamin A and related compounds, 55% of folate, and the majority of dietary fat from plant sources. They’re also the primary source of key antioxidants like lycopene, found in tomatoes and watermelon. Minerals are affected too: 58% of calcium and 62% of fluoride in the global food supply come from crops that benefit from animal pollination. A world with fewer pollinators wouldn’t just mean less food. It would mean less nutritious food, with serious consequences for human health.
It’s Not Just About Bees
Bees get most of the attention, and for good reason: they’re the most prolific and efficient group of crop pollinators. But they’re far from the only ones that matter. Flies, beetles, butterflies, moths, wasps, ants, birds, and bats all contribute. Research published in the Proceedings of the National Academy of Sciences found that non-bee insects account for 25 to 50% of all flower visits to crops and provide roughly 39% of crop flower visits across 39 studies analyzed. Critically, fruit production increased with non-bee visits independently of how many bees were present, meaning these other pollinators provide benefits that bees alone cannot.
This diversity matters beyond agriculture, too. Different pollinators are active at different times of day, in different seasons, and in different weather conditions. A flower that a bee can’t reach might be perfectly suited to a long-tongued moth or a hovering hummingbird. Maintaining a diverse community of pollinators makes the entire system more stable, because if one group declines, others can partially compensate.
Some pollinators also pull double duty. Bats, hoverflies, lacewings, parasitic wasps, and ladybirds contribute to pest and disease control while also pollinating plants. Losing them would mean losing both services at once.
Pollinators Signal Ecosystem Health
Because pollinators are sensitive to environmental changes, scientists use them as living indicators of ecosystem condition. Bees and butterflies respond quickly to synthetic pollution, making them useful monitors of pesticide contamination and habitat degradation. Honeybees, for example, accumulate heavy metals like copper, zinc, arsenic, and cadmium in their bodies, giving researchers a snapshot of contamination levels in the surrounding landscape. Bats serve a similar role for tracking pesticide exposure and disease prevalence.
When pollinator populations are diverse and abundant, it generally signals a healthy ecosystem with clean air, intact habitat, and functional plant communities. When they decline, it’s often an early warning that something in the environment has shifted for the worse.
Pollinator Declines Are Already Underway
A 2025 study in PNAS assessed nearly 1,600 vertebrate and insect pollinator species in North America and found that more than one in five faces elevated extinction risk. Bees are the hardest hit group, with 34.7% of assessed species at risk. Among butterflies, 19.5% are threatened. All three pollinating bat species in the study region are at risk.
The causes are familiar: habitat loss, pesticide use, climate change, disease, and invasive species. What makes pollinator loss particularly dangerous is the ripple effect. Losing pollinators doesn’t just harm the species themselves. It reduces seed and fruit production in wild plants, weakens genetic diversity across plant populations, shrinks food supplies for wildlife, and threatens the nutritional quality of human diets.
Restoration Can Pay for Itself
Strategic habitat restoration aimed at supporting pollinators can produce measurable economic returns. A study published in PLOS Biology modeled restoration scenarios and found that restoring natural areas within and around croplands increased forest cover by approximately 20% while doubling collective agricultural profits over 40 years. That’s true even after accounting for the farmland taken out of production. The key is that many native bee species need natural areas for nesting, so restoring habitat near crops boosts pollination and yields on the remaining farmland.
Planting wildflower strips, preserving hedgerows, reducing pesticide use in buffer zones, and maintaining patches of native vegetation are all practical steps that support pollinator populations. These aren’t just conservation measures. They’re investments in the ecological infrastructure that food production and wild ecosystems both depend on.