PNG & Transparent background - several layer effects, just depends what you like.
beautiful macaw btw! I have a mini yellow neck, love him!
(both pics are yours, I just added more light to the iguana to make him pop a bit and more contrast to the macaw. The font can be anything really. I just tried 2 but have hundreds with different effects that can be applied; just not sure what you are looking for. The font color choice was to keep it more in line with nature.