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Islands of greenery, called refugia, survive even the worst fires, sheltering species and renewing charred landscapes. View the full article

Nootka lupine, introduced in the 1970s to control soil erosion, has spread wildly, threatening native species. But many adore its purplish blue flowers. View the full article

From the flower arrangement to the plate, this is the era of the formerly unwanted plant. View the full article

A reader offers advice for keeping companion animals safe. View the full article

“What we’re doing is nothing unnatural,” said the author of a study to produce quolls that don’t like the taste of deadly toads. “It’s just matchmaking.” View the full article

The invasive plant is widespread in New York and was recently spotted for the first time in Virginia, but conservationists believe they can fight it. View the full article

Some invasive ladybugs feast on other species of ladybugs, but not as much when a kind of toxic aphid is around. View the full article

The invasive insects turned up in Pennsylvania in 2014. Now the state has placed 3,000 square miles under quarantine, and scientists worry the pest will spread. View the full article

The invasive insects turned up in Pennsylvania in 2014. Now the state has placed 3,000 square miles under quarantine, and scientists worry the pest will spread. View the full article

The largest bat in Europe, a vulnerable species, found shelter in a city park’s trees. Then they started to turn up dead. View the full article

The largest bat in Europe, a vulnerable species, found shelter in a city park’s trees. Then they started to turn up dead. View the full article

Officials are on the lookout for caterpillars of the oak processionary moth, larval creatures whose hairs can cause illness and even death in humans. View the full article

The city has 10,542 acres of forests. The Natural Areas Conservancy, which says they are at a tipping point, is thinking about how to care for them. View the full article

The city has 10,542 acres of forests. The Natural Areas Conservancy, which says they are at a tipping point, is thinking about how to care for them. View the full article

As the country imports ever more of its fruits and vegetable, it’s time to examine the positive and negative effects on consumers and farmers. View the full article