I try to do this in the RAW converter. In ACR I either use 'recovery' to tone down the whites or curves which usually takes care of the problem. The blacks are blocked here, too. Applying curves would fix this.
Great capture, BTW. Great to see one perched and the leaf adds to it. I might clone out the flowers above the head.
I completely agree with adjusting with the sliders, or curves in ACR. The recovery slider to reduce appearing to be blown out whites is most useful. Once in Photoshop, these same adjustments can create nasty halos and other problems. regards~Bill
All you have to do is after converting in Camera Raw, select the whites via Color Range, feather by very little and create a layer with them. Use multiply as your blending mode and voila, the rest of the picture is untouched. Play with the opacity if effect is too much or repeat the process if not enough.
I think you could use some black on the blacks for the blue to be a bit darker.
The scene is adorable and an excellent habitat image.