Same beetle as the previous post but shot with off flash.
https://www.deviantart.com/melvynyeo/art/Darkling-Beetle-with-fake-eyes-538908581

Quote from https://www.deviantart.com/users/outgoing?http://en.wikipedia.org/wiki/Darkling_beetle
Darkling beetles vary in their biology. Many feed on plant matter, some on fresh and some on decaying vegetation; some are generalist feeders on detritus, whether of animal or plant material. Many major pests of stored food are species in genera within the Tenebrionidae. Examples include species in the genera Alphitobius, Blaps, Gnatocerus, Latheticus, Palembus, Palorus, Tenebrio, and Tribolium.

Species within the Tenebrionidae occupy various ecological niches and accordingly are important resources for ranges of predators and parasitoids in the food chain, including birds, rodents, reptiles, and arthropods such as sun spiders, Hymenoptera and Acari.

Some species live in intensely dry deserts such as the Namib, and have evolved adaptions by which they collect droplets of fog that deposit on their elytra. As the droplets accumulate the water drains down the beetles’ backs to their mouthparts, where they swallow it.

A few insects, like the Iron Cross Beetle, are pests.