Soga said their survey echoed findings from around the world. For example, a 2014 study of 1,100 students in China elicited similar emotional reactions — and, like the Japanese study, found that direct contact with nature helped to turn biophobia into biophilia, the term popularized by biologist E.O. Wilson to refer to human connection with other forms of life.

Although the children's reactions were somewhat expected, the new study did contain an unexpected finding: Many of the surveyed children revealed that their parents also expressed fear or disgust of the same invertebrates. In fact these parental emotions were strong enough to overwhelm any positive experiences the children might have gained from direct experiences in nature.

As Soga and his coauthors wrote in their paper, "Our results suggest that there is likely a feedback loop in which an increase in people who have negative attitudes towards nature in one generation will lead to a further increase in people with similar attitudes in the next generation — a cycle of disaffection towards nature."

And that's possibly the greater threat posed by extinction of experience. Soga suggests the generational loss — a condition previously dubbed environmental generational amnesia — could chip away at our societal ability to preserve what we're losing.

"I believe that increased biophobia is a major, but invisible, threat to global biodiversity," Soga said. "As the number of children who have biophobia increases, public interest and support for biodiversity conservation will gradually decline. Although many conservation biologists still consider that preventing the loss of wildlife habitat is the most important way to conserve biodiversity, I think preventing increased biophobia is also important for conservation."

What's to be done about this? The paper makes several recommendations, the most obvious of which is that children should experience nature more often. The authors also suggest establishing policies to guide these natural experiences and increasing educational programs about the natural world.

Helping parents to see species around them in a new light would make a difference, too.

And, of course, maintaining support for preserving the wild spaces where these "scary" and "icky" creatures live is the most important thing of all.

That's a point reinforced by another recent study, which found that wild spaces located within urban areas — and the plants and animals that thrive in them — are particularly important for human health and well-being.

Published in the journal Frontiers in Sustainable Cities, the study examined attitudes toward Discovery Park, the heavily forested 534-acre public park in Seattle, Washington. It found that the public had the most appreciation for — and gained the most value from — the wildest parts of the park.

"I have seen orca whales, seals, fish, eagles, herons, shorebirds and many other sea creatures in their natural habitat," one survey participant wrote. "Going here with people has allowed me to connect and talk with them about conversation that simply does not happen in everyday life," wrote another.

The participants reported that their most valuable experiences in the park included encountering wildlife, walking through open spaces, exploring the beach and finding beautiful views.

"We saw that a large majority of participants' interactions, especially their most meaningful interactions, depended on Discovery Park's relative wildness," said lead author Elizabeth Lev, a master's student in the University of Washington's Human Interaction With Nature and Technological Systems Lab.

This is only possible because the park is relatively wild. After all, you can't enjoy watching birds if there are no birds to follow; gaze at the sunset if it's obscured by skyscrapers; or stop and smell the flowers if they don't have room to grow.

And yet even this long-protected space could someday become less hospitable to nature. Over the past few years a lot of people and organizations have suggested developing parts of Discovery Park or the neighboring area. Most recently a plan proposed building 34 acres of much-needed affordable housing and parking spaces adjacent to the park, bringing with them noise, traffic and pollution.

If anything like that happened, both the park and the people of Seattle could lose something vital. And that would continue the trend of chipping away at Seattle's — and the world's — natural spaces, leaving just tiny pocket parks and green-but-empty spaces that offer little real value to wildlife, plants or people.

"It is true that any interaction with nature is better than none, but I don't want people to be satisfied with any small bit of grass and trees," Lev said. "We have been in this cycle of environmental generational amnesia for a long time, where the baseline keeps shifting and we don't even realize what we're losing until it's gone. If we can get people to understand how much meaning and value can come from having more experiences with more wild forms of nature, then maybe we can stop this cycle and move toward conserving and restoring what we have left."

Building this understanding in an ever-more fearful and disconnected world may be the biggest challenge. Peter Kahn, the senior author of Lev's paper and the director of the Human Interaction with Nature lab, made several suggestions for bridging this gap in this 2011 book, Technological Nature. They echo the recommendation about getting children into nature, but also include telling stories of how things used to be, imagining what things might be like in the future, and developing a common language about nature, "a way of speaking about wild and domestic interaction patterns, and their wide range of instantiations, and the meaningful, deep and often joyful feelings that they engender."

No matter what techniques we use, this growing field of research illustrates that saving nature requires encouraging people to experience it more often and more deeply. That calls for additional research — Lev and her coauthors have published a toolkit that other municipalities can follow to study the value of their own wild spaces — and clear communication of the results.

"If we can continue to characterize and show people the benefits of these wild spaces," Lev said, "maybe people will begin to see more value in keeping these areas undeveloped — for the sake of our mutual benefit."