A Tortoise, A Shield Or A Face?

This is a nymph of shield bug Eurygaster testudinaria, so called because the adult resembles a tortoise. Is it just me or does this instar look like a tribal mask face?

Today's poem is When the heart by Michael Leunig. http://www.leunig.com.au/works/poems

I love this. Particularly the healing salty sea wind and the lick of a stray dog.