Researchers analyzed saliva the nocturnal mammals leave behind when sipping nectar from plants and residential hummingbird ...

He describes himself as a 'street fighter', conjuring an image of an immigrant who has fought his way out of a Midlands ghetto ... his elder brother Kamran last night. 'Father wanted him to ...

But evidence of other creatures, such as moths and bats that leave barely any trace at all, can be harder to see. Here are our top tips for how to see nocturnal animals as they go about their busy ...