A new study finds why some birds thrive in cities while others go extinct due to human activities — they can either grow large brains or produce more offspring.
“On the one hand, species with large brains, like crows or gulls, are common in cities because large brain size helps them deal with the challenges of a novel environment,” said lead author Ferran Sayol of Sweden’s University of Gothenburg.
“On the other hand, we also found that small-brained species, like pigeons, can be highly successful if they have a high number of breeding attempts over their lifetimes.”
Fish and even dolphins have returned to the now-calmed waters of Venice’s famed canals due to the shutdown of tourism and daily life during Italy’s coronavirus health crisis.
The hundreds of speeding motorboat taxis and tourist boats that used to churn La Serenissima’s canals are now docked in silence. The huge cruise ships are also gone, while even most of the gondolas are moored.
The city’s typically turbid canals are now clear enough to see the native seaweed and returning schools of fish.