I have a question about the recipe "Fish Sauce Vinaigrette" from stephanie le. what is birds eye chili
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.
It's also known as a Thai chili in some places. It can be red or green.
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.