I posted about this in crittergarden's "I started a blog" thread, in Sandbox, but felt it might be worth sharing here also.
I've been distressed by party balloons for years. Odd thing to be distressed by, right? Until you realize what they do to the critters, once we're through playing with them. Even the newer so-called biodegradeable balloons are not significantly better; they take far too long to disintegrate and they're still killers of birds and fish.
This blog post gives some detail:
http://deepmiddle.blogspot.com...