In macro, a diffuser provides valuable services. It can be of a fine fabric which reduces the intensity of the sun and increase the light source to reduce harsh shadows. It can also be in the form of a "hat" which is fixed to the top of a flash to have the same pre-mentioned effect.
This solution is very interesting because the diffuser remains in the same place since it is attached to the flash and thus it frees a hand that will be able to lead a reflector to fill in the background.
This type of diffuser is compact and comes in multiple sizes that have to be chosen according to the size of the subject.
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MissNumerique: Diffuser for cobra flash
I particularly like reflectors with one face white and the other gold. The white face reflects light without altering the color temperature and the golden side produces a warm dominant on the images like the last/first sunbeams. It can bring the touch of light that was missing, like displayed on the macro of the butterfly.
It is possible to make it out of a thick sheet of cardboard, on one side of which one glues aluminized plastic and on the other a gold colored plastic. It can be easily renewed if damaged.
It is also very useful to have a garden rod that can be planted in the ground to fix the reflector by the joint clamp as shown in the following image above.