Nuthatch Revisited

I believe that I have posted, if not this exact image, then one very similar to it. What is different this time is that I have processed the image using my stamp filtering process. 

With this image shot at ISO-100, I am a little surprised at how much noise you find in the background. However, as they say, there's noise, and then - there's noise. The kind of noise that you see in this image is not the same kind of noise as what you would see in, say, an ISO-1600 image. Where the noise comes into play in this image is due to the low light levels, as I was shooting later in the day (and with my exposure level turned down in order to get a quicker shot.)

Here is the colorized version.

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