Synonyms for Croaking (same or very similar meaning)
WordNet sense 1 (a harsh hoarse utterance (as of a frog)):
croakWordNet sense 2 (like the sounds of frogs and crows):
croaky, gutturalWordNet sense 3 (having an unpleasant sound):
cacophonous, cacophonicFrom the ODE community, based on WordNetadd/edit