I was able to put this achievement to rest during this week and thank god I bought the strategy guide. I can't even dream about undertaking this task in a blind rage because there are about 20 out of the 200 pigeons that are totally hiden in messed up locations. All in all it still probably took me a good 5 hours to track every last one of the rats down.

Here are some quick tips if you anyone else is currently planning this crazy task:

1. Buy the strategy guide: Sure online guides are nice, but the GTA book has nice pictures and detailed maps of where each bird is located

2. Go into the task all at once. Meaning don't just shoot random birds with out marking down there spots, otherwise you will have a huge headache looking for the last damn hidden one.

3. Sniper rifle = very important; grenades = funniest way to kill 'em

4. Finally, after shooting the pigeon on the top of the Alderney hospital, don't try to jump down. You won't live, trust me.