foster parent

In late April, the agency located Murray’s foster-parent file.

The Department of Health and Welfare also revoked his foster-parent license.

How does the young Molothrus learn to distinguish, even by sight, its foster-parent from any other bird approaching the nest?

As for my foster-parent, he gradually recovered from the stupor that had overwhelmed him, but never regained his wonted energies.

As the robin is a favourite foster-parent with cuckoos, my first thought was that this might be an unusually small egg of the parasitic bird, which was very plentiful thereabouts.