nidification
noun
ni·di·fi·ca·tion ˌni-də-fə-ˈkā-shən 
ˌnī-
: the act, process, or technique of building a nest
Word History
Etymology
Medieval Latin nidification-, nidificatio, from Latin nidificare to build a nest, from nidus nest
First Known Use
1658, in the meaning defined above