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The Collaborative International Dictionary
Nidificate

Nidificate \Nid"i*fi*cate\, v. i. [imp. & p. p. Nidificated; p. pr. & vb. n. Nidificating.] [L. nidificare, nidificatum; nidus nest + -ficare (in comp.) to make. See -fy, and cf. nest.] To make a nest.

Where are the fishes which nidificated in trees?
--Lowell.

Wiktionary
nidificate

vb. (context intransitive English) To make or build a nest.