We could all use a dose of nature right now. Thankfully, the California Academy of Sciences’ renowned BigPicture Photography Competition is here to deliver just that. The contest celebrates some of the world’s best photographers and the year’s most jaw-dropping images. In addition to highlighting Earth’s biodiversity, the winning images also illustrate the many threats that our planet faces. "Each photo, in its own way, inspires viewers to protect and conserve the remarkable diversity of life on Earth," bioGraphic states on its website

Here are some of this year's winners and finalists:

Hold on Tight – Aquatic Life Finalist
Beneath the turbulence of a small waterfall in France’s Lez River, a male common toad (Bufo bufo) holds on for dear life. Not his own life, though – the male is helping to ensure his species’ survival by fertilising his female companion’s eggs as she lays them. Known as amplexus – Latin for ‘embrace’ – this mating behaviour is common among amphibians and other animals whose eggs must be fertilised externally. Males temporarily develop glands on their toes, known as nuptial pads, to help them grip the swollen abdomens of the females. Then, as the female releases thousands of eggs in pearly, gelatinous strands, the male coats them with sperm. Scores of toads seeking partners for this ancient dance of procreation are killed each spring by motor vehicles. Fortunately, some European communities have built canals and even enlisted toad-shuttling volunteers to help them cross roads and reach their mates.
Image: Mathieu Foulquié/BigPicture
Guardians of the Giraffes – Photo Story Winner (one of six images)
Too often, says Ami Vitale, nature photography excludes the humans whose lives are intertwined with the natural world. Her decade-long project documenting the bonds between Samburu people and wildlife in northern Kenya reverses this oversight, telling the story of how Samburu people became advocates for wild animals and their habitat. For as long as Samburu people have grazed livestock, their livelihood has been seemingly at odds with the elephants, rhinos, giraffes, and other large mammals with whom they share their homeland. But as poachers decimated elephant (Mammalia proboscidea) populations in recent decades, Samburu herders realised their cattle were also suffering. Elephants promote grass growth by clearing brush and small trees, so as their numbers shrink, there’s less grass for cows to graze on. In response, the Samburu launched a sanctuary to rehabilitate orphaned elephants, along with other conservation programs that benefit threatened species like the reticulated giraffe (Giraffa camelopardalis reticulata), shown here. These efforts are changing long-standing Samburu attitudes toward wildlife, and show how the health of human and animal communities are connected. “Indigenous communities hold the key to saving Africa’s great animals,” says Vitale. “Where these communities are intact, poaching has dramatically decreased.”
Image: Ami Vitale/BigPicture
Shelter in Place– Grand Prize Winner
To get this intimate shot of a mountain hare (Lepus timidus) curled up against a Scottish winter storm, Andy Parkinson endured weeks of ferocious cold and wind that drove shards of ice into his face. Britain’s only native rabbit species, on the other hand, is utterly at home in these inhospitable conditions. Groups of twenty or more hares gather each winter to nibble heather on leeward slopes, where the snow tends to be shallower. Before resting, they jump away from their tracks to confuse predators. And while some ride out storms in burrows or depressions, this female created her own shelter, tucking herself into a ball to conserve heat and minimise exposure to the elements. It’s a nifty strategy for surviving the kind of weather that drives most creatures indoors or underground. Despite their fortitude, mountain hares are Britain’s fastest-declining mammal, due to unregulated hunting and habitat loss. Parkinson hopes that calling attention to these remarkable rabbits will convince legislators to protect them.
Image: Andy Parkinson/BigPicture
Mushroom Magic – Landscapes, Waterscapes, and Flora Finalist
Despite the ethereal appearance of this photo, these edible mushrooms (Macrolepiota procera) won’t induce any hallucinations. But that doesn’t mean they aren’t magical. Indeed, the more we learn about mushrooms, the more magic they seem to harbour. From helping trees communicate to producing cancer-fighting metabolites, scientists have only begun to uncover the fantastic features of fungi. At the root of many of these capabilities is the unique role that mushrooms play in the environment. As primary decomposers, mushrooms break down the organic matter of dead plants and animals. In return, the fungi become flush with essential nutrients and minerals, a number of which can confer antioxidant, antimicrobial, and anticancer benefits to humans. This same ability also makes mushrooms exceptional environmental remediators, ingesting the toxins and heavy metals that various industrial practices have leached into the soil.
Image: Agorastos Papatsanis/BigPicture
Pond Skim – Winged Life Winner
In Gorongosa National Park, at the southern tip of Africa’s Great Rift Valley, water breathes with the seasons. Lakes and rivers that overflow during the winter months are reduced to puddles and trickles come summer. For many species – including the Mozambique long-fingered bat (Miniopterus mossambicus) – the dry season means longer journeys for a much-needed sip of water. As our planet warms and droughts increase in both frequency and intensity, the seasonal oases that bats depend on are drying up. Without adequate water, healthy bats begin to weaken, making them more susceptible to diseases that are already devastating populations around the world. Those that survive are sometimes forced to drink from human-made bodies of water – a boon for bats, but a potential risk for people who drink from those same water sources, since bats carry a host of zoonotic diseases. It’s often at these interspecies interfaces that killers like Ebola and the novel coronavirus emerge.
Image: Piotr Naskrecki/BigPicture
Speed and Strategy – Terrestrial Wildlife Winner
Although they’re the fastest land animals in the world, catching prey is no easy feat for a cheetah (Acinonyx jubatus). The mostly treeless terrain of the African savanna gives antelopes, impalas, and other ungulates ample time to spot approaching predators, and even a slight head start can be the difference between life and death. To avoid alerting their prey, cheetahs start out hunting low to the ground, where their spotted coat helps them blend into the terrain. When they get within 60 meters (200 feet) of their target, cheetahs accelerate at a blistering pace, reaching 95 kilometres (60 miles) per hour in a matter of seconds. But the feline predators still have to account for the speed of their prey – in this case an impala (Aepyceros melampus), which can zig-zag at upwards of 80 kilometres (50 miles) per hour. To close the gap, this cheetah tripped its quarry as it attempted to escape, proving that sometimes, strategy is just as important as speed.
Image: Yi Liu/BigPicture
A Sticky Situation – Landscapes, Waterscapes, and Flora Winner
Innocently poised on the thin red spines of an oblong-leaved sundew (Drosera intermedia), beads of nectar beckon insects like sweet garnishes on a lethal cocktail. When an insect lands to sip the nectar, the carnivorous sundew slowly curls its leaves around it, releasing digestive enzymes that liquify its unsuspecting prey into a digestible meal. If a sundew ensnares something inedible, it promptly releases the non-nutritious offender from its grasp. Nitrogen and phosphorus from eating insects allows sundews to thrive in places where most plants can’t survive, like the acidic, nutrient-poor soil of swamps and bogs. These adaptations fascinated Charles Darwin, who wrote in 1860 that he cared “more about Drosera than the origin of all the species.” Nonetheless, Darwin would wait 15 years before publishing his controversial suspicions that, indeed, some plants eat animals.
Image: Edwin Giesbers/BigPicture
Hippo Huddle – Terrestrial Wildlife Finalist
Each winter, as the waters of Botswana’s Okavango River spread across its vast delta, an array of African wildlife congregates to eat, drink, splash, and soak. This seasonal wetland was especially important in 2019, when severe drought left human and animal populations alike desperate for water. Cattle, elephants, crocodiles, and other creatures were left to vie for any water they could find in the delta’s shrinking pools. Among those seeking refuge were herds of hippopotamuses (Hippopotamus amphibious). These semi-aquatic herbivores are well-equipped for spending hours each day in the water – their nostrils and eyes located so high on their head that they can breathe and see while mostly submerged. They’re also graceful swimmers, and can hold their breath for up to five minutes. But even their aquatic abilities and impressive heft were no match for last year’s muddy, drought-stricken delta. At least 200 hippos became trapped in the mud, and managed to survive only because Botswana wildlife officials pumped in water to help them escape. As the climate warms, such droughts may become more frequent across much of Africa.
Image: Talib Almarri/BigPicture
A River Gone Awry – Art of Nature Winner
Along the Río Tinto in western Spain, layers of multicoloured sediment combine with blood red water to produce an otherworldly effect. But the strange coloration – shown here in a photo of cracked mud at the river’s edge – has familiar origins: Runoff from millennia of mining in the surrounding Sierra Morena has caused rampant acidification and toxic levels of dissolved metals. The pollution is so extreme that NASA has used the river and the resilient microbes that call it home as a proxy for the conditions for life on Mars. Unsurprisingly, the water is unusable for the communities that live near it – at least for now. In 2016, a collaboration between a team of Spanish researchers looking into the mineralogy of the river and a group of French researchers seeking to decontaminate it made an important discovery. When the water was purified, the leftover solids contained a high concentration of microscopic aluminum particles, a valuable commodity which can be sold to offset the cost of decontamination.
Image: Juan Jesús González Ahumada/BigPicture
The Cost of Cats – Human/Nature Winner
Every year, the staff at WildCare, a California animal rescue organisation, is tasked with rehabilitating hundreds of birds and other wild animals mauled by outdoor house cats. The 200 pictured here did not survive. “I wanted to create an image to show some of the impacts our pets have on the wildlife around our homes,” says Jak Wonderly. One of those impacts is a world with less birdsong. In the United States alone, more than 2 billion birds are killed by cats annually. Other nations, including Australia and New Zealand, have tried to protect native wildlife by imposing restrictions on cat owners, such as “cat curfews” that require cats to be indoors after dark. But because such measures are unlikely to gain traction in North America, Wonderly took this devastating photo. By illustrating the suffering that free-roaming house cats cause, he hopes to spark discussion about alternative solutions for reducing the death toll caused by our pets.
Image: Jak Wonderly/BigPicture
Snack Attack – Art of Nature Winner
After an unsuccessful attempt at grabbing a snack, this African savanna elephant (Loxodonta africana) took out its frustrations on the roof of an open-air kitchen in Malawi’s Kasungu National Park. Photographer and biologist Gunther De Bruyne says such destruction was common during his stay at a research station there. But, De Bruyne adds, there’s a reason why Kasungu’s elephants are unusually dangerous: He and other scientists have found that elephants from heavily poached regions tend to be more aggressive. In 1977, more than 1,000 elephants roamed Kasungu. By 2015, poaching had reduced the population to just 50. While recent ivory bans might be turning the tide – there are now over 80 elephants in the park – recovery takes time, especially among animals as intelligent and long-lived as elephants. Maybe on De Bruyne’s next visit, the kitchen roof will remain standing.
Image: Gunther De Bruyne/BigPicture
Berg Buffet – Aquatic Life Winner
French photographer Greg Lecouer braved frigid waters to catch this rare glimpse of life below Antarctic ice, where he encountered a crew of crabeater seals (Lobodon carcinophaga). Clumsy and laborious on land, crabeater seals are elegant and agile swimmers that spend their entire lives in the pack ice zone surrounding the frozen continent. Buoyed by polar currents, icebergs calve off mainland glaciers, carrying minerals and nutrients from land into the ocean. Once sea bound, the icebergs slowly melt, releasing critical nutrients in their wake and providing seals with both food and shelter. The fertilised waters prompt a bloom of phytoplankton that attracts krill – which, despite the crabeaters’ name, is a favourite meal of the seals.
Image: Greg Lecoeur/BigPicture

These images originally appeared on bioGraphic, an online magazine about science and sustainability and the official media sponsor for the California Academy of Sciences' BigPicture Natural World Photography Competition.

Header image: Talib Almarri