It is fun, but I do not want to obsess over it. If I hear a crow, I will tag it, but I am sure miss some. I can see it going a few ways

1) just a sound effect
2) a sound affect for Scratch / family like Darth Vader or Luke music in the movies
3) a place holder telling us that Scratch / family are doing something somewhere else in the story "off camera"

I hope it is not number one. That is kinda waste of time and that means I get a serving of Red Herring to go with my crow.