Light pollution hurts urban bats. Trees can help.

By Liz Langley
Green spaces within cities can lessen the impact of artificial light on bats, a new study says.

YOU’D THINK HALLOWEEN would be the battiest time of the year, but these winged mammals merit a second annual celebration.

In honor of National Bat Appreciation Day, we’re taking a look at urban bats and how they manage to live among us. (Get the truth behind six bat myths.)

Excessive artificial lighting, also called light pollution, can have a negative effect on many nocturnal animals, for instance by disorienting them or interfering with their reproduction.

But that hasn’t stopped bats from making their homes in cities. For instance, 18 of Germany’s 25 bat species live in Berlin, which is also made up of 20 percent forest.

“Trees provide a lot of benefits for bats,” including roosts, shelter from wind and predators, and better foraging opportunities, says Tanja M. Straka, a researcher at the Leibniz Institute for Zoo and Wildlife Research.

Source: Light pollution hurts urban bats. Trees can help. – National Geographic, 2019-04-17