From Audubon.org
“For migrating birds, timing is key. Their journeys require massive amounts of energy, so they need plenty of fuel on their way, and after they get to their breeding grounds, they’ll have hungry chicks to feed, too… These travelers rely on the newly-available resources brought by spring, such as leaves, flowers, and the insects that come out to munch on them. But that abundance of resources dies down later in the season—and if birds arrive at a stopover or breeding site after this peak period of ‘spring green-up,’ they might miss out on the feeding frenzy. |
