Richard Collins: Migration timing is crucial — so what happens if birds travel too early or too late?

Pity the poor migrants arriving hungry and exhausted after an arduous journey, only to find that the locals have eaten the lion’s share of the creepy-crawlies and commandeered the best nesting locations

Brent Geese nest on the islands of the Canadian Arctic and then embark on a 6,000 kilometre journey to Ireland

To everything there is a season and a time for every purpose under heaven

The writing is on the wall for frequent flyers: air travel must be curtailed if we are to tackle the climate problem. The greenhouse gas emissions from aircraft are unsustainable. But we won’t be the only species having their wings clipped — migrant birds have a problem also.