A. It takes two to six days for robins to build their nest. This robin sounds inexperienced. If this is not an appropriate place for her to nest, the quicker she figures it out the better.Sometimes tenacity if important, but this bird is wasting time and energy.f you move a robin's nest the parents will most likely abandon the nest, eggs and/or young. Here's why: Nest-site fidelity grows during the nesting season. The more time and energy the birds invest in the nest, the less likely they are to abandon it when disturbed.