I almost didn't post this one but then I thought "what the heck...". As an example of something different from a simple filter, this was done entirely with a curves adjustment layer. I will post a picture of the curve also. This extreme curves adjustment made serious halos around the bird and perch, so I tried to minimize those using the blur tool on the edges. Not sure it worked... You can also see "sparklies" on the perch and his legs, but like I said - it's an example. :D