When we say "birds singing", there is a positive connotation.
When we say "birds crowing", there is a negative connotation.
"The birds are making some sound" seems to be objective, and thus neutral.
I was wondering is it true that 鳴く is absolutely neutral?
In other words, would the sentence 「小鳥が鳴いてる。」 have a positive connotation, negative connotation, or is it an absolutely neutral sentence?