English edit

Etymology 1 edit

From birdnest +‎ -ing (present participle ending).

Verb edit

birdnesting

  1. present participle and gerund of birdnest

Etymology 2 edit

From birdnest +‎ -ing (gerund ending).

Noun edit

birdnesting (countable and uncountable, plural birdnestings)

  1. The act or process of collecting bird eggs