If this were the case the process of laying and hatching might be inconveniently long, more especially as she migrates at a very early period; and the first hatched young would probably have to be fed by the male alone.
Horrela balitz, erruteko eta txitatzeko prozesua luzeegia litzateke, bereziki emea arin migratzen delako eta arrak bakarrik elikatu beharko lituzkeelako ziurrenik txorikume arrautzatik irtenberriak.