CBC reported on UBC zoology research that found a small cluster of genes that could be responsible for songbird migrations up to 15,000 kilometres long.
Kira Delmore, lead project researcher, said the migrations could be so long because the birds are so tiny – some weigh less than 20 grams.
“We know the timing of migration is strongly linked to changes in daylight. So this could suggest that this behaviour is associated with genes that are controlling circadian rhythm,” she said.
