OxfordShearwaters’ body clocks slip over an hour on fast flights.

Birds steer by the sun, so a wrong clock sends them the wrong way.

Eastbound Manx shearwaters crossing 15° of longitude misread the sun, drifting clockwise out of sight of land across nearly 4,000 tracked trips.

After 1,000 km, a bird flies only 5 km extra, University of Oxford researcher Patrick Lewin says.

Lewin says near-polar species, possibly including polar bears and Arctic foxes, may be affected more strongly.

How each outlet framed it
New Scientist
reports the bird clock shift as a true jet-lag analogue, with Lewin noting it likely applies to other long-distance fliers including insects and bats

Sources: New Scientist