ISO 10,000 for this one! Amazing what modern sensors can do. All processing done in Lightroom. 3 tips for high ISO bird pics...one, expose to the right (overexpose slightly), two, don't crop too much and 3, process on the dark side if it suits the photo and mood. 3rd party noise reduction software can also improve the photos...I just wanted to show what could be done with the basics in Lightroom.
This is an American Redstart, taken in Nova Scotia, Canada.