I chose not to use fill in flash but I gave + 2/3 stop using Evaluative metering.
Canon 20D Canon 180mm macro Tripod,MLU, & cable release
ISO 100 + 2/3
1/8 sec @ f16
Beautiful image Jon. Looks well exposed on my monitor. Smooth bokeh that u've got makes it all the more better. Nicely composed. Like the way the the caterpillar is leaning out on the twig.