what is birds eye chili

http://en.wikipedia.org/wiki/Bird%27s_eye_chili

If your local store doesn't carry this variety, I'd just use serrano chile, which is in most grocery stores, at least near me.

It's a medium hot (50-100,000 Scoville units) chili, small & ted if I remember rightly. If you can't find it use less of a hotter chili, e.g.scotch bonnet, in 100-350,000 scoville range; or more of a Mulder chili, e.g. cayenne, in the 30-50,000 Scoville range.