Two birds can weigh the same, about 11 kilograms each, and still live in entirely different energy economies. An Andean ...

An international study has overturned a longstanding textbook view of how much energy animals use to travel, revealing that ...

A study of bird and bats in the wild showed that once the atmosphere is taken into account, flying can be the cheapest form ...

Discover the Andean condor, an emblem of the Andes, famed for its massive wingspan and vital ecological role. The Hollyoaks Hutchinsons on tragedy and developing Girl, 12, shot dead and three adults ...

The largest study of flight costs in the wild finds that riding the air can make flying cheaper than swimming, overturning a ...

The largest study yet to examine flight costs in wild birds finds that riding the air can make flying energetically cheaper than swimming, overturning a textbook ranking. Published in Science, the ...

If you liked this story, share it with other people. A scavenger species, the Andean condor plays a vital role in ecosystems by preventing the spread of diseases found in carcasses. But human ...

An Andean condor and a trumpeter swan both weigh about 11 kilograms. Yet the condor covers each kilometer of flight for about a fifth of the swan's ...