
Spotted hyena Crocuta crocuta
Spotted hyena Crocuta crocuta with leg bone of giraffe

Anting Green woodpecker Picus viridis
Green woodpecker Picus viridis anting for parasite removal

Feeding Greater Spotted woodpecker Dendrocopos major
Greater Spotted woodpecker Dendrocopos major seeking food. Using its beak to pry under areas of bark, the woodpecker looks for small insects.

Digestive system of bird
Digestive system of bird using domestic chicken, in diagram format, with close up of gizzard

Bighorn sheep Ovis canadensis
Bighorn sheep Ovis canadensis fighting, using his horns to charge at a mating rival.

Comparison of Beak use in Darwin’s Finches
Comparison of Beak use in Darwin’s Finches. Stippled illustration showing singing, feeding, and preening.

Beak comparison in Darwin’s finches
Beak comparison in Darwin’s finches showing use feeding, singing, and preening. Line drawing.

Singing Darwins Finch Geospiza fuliginosa
Singing Darwin’s Finch Geospiza fulginosa showing beak in use.

Singing Darwins Finch Geospiza fuliginosa
Singing Darwins Finch Geospiza fuliginosa. Line drawing showing Galapagos finch and beak use.

Bird preening Darwins Finch Geospiza magnirostris
Bird preening Darwins Finch Geospiza magnirostris line drawing showing the beak in use in parasite removal

Preening Darwin’s Finch Geospiza magnirostris
Preening Darwins Finch Geospiza magnirostris line drawing showing the beak in use in parasite removal

Darwins Finch Geospiza magnirostris eating a Tribulus seed
Darwins Finch Geospiza magnirostris with Tribulus seed. Stippled illustration showing beak adaptability.

Darwin’s Finch Geospiza magnirostris with Tribulus seed
Darwin’s Finch Geospiza magnirostris with Tribulus seed (line drawing)

Rocky shore line ecosystem zonation of species
Rocky shore line ecosystem zonation of species. Some of the animals and pants featured include whelks, mussels, bladderwrack, star fish, top shells, periwinkles, crabs, branacles, and anenomes. Illustration from The Hidden Universe: Adventures in Biodiversity by Alexandre Antonelli

Oyster mushroom Pleurotus ostreatus
Oyster mushrooms Pleurotus ostreatus growing from a shared base. Illustration from The Hidden Universe: Adventures in Biodiversity by Alexandre Antonelli

Thylacine Thylacinus cynocephalus
Thylacine Thylacinus cynocephalus, an extinct marsupial mammal. Illustration from The Hidden Universe: Adventures in Biodiversity by Alexandre Antonelli

Wolf hunting Elk
Wolf Canis lupus hunting Elk Cervus canadensis in Yellowstone Park. Illustration from The Hidden Universe: Adventures in Biodiversity by Alexandre Antonelli

Hedgehog Erinaceus europaeus with nettles
Hedgehog Erinaceus europaeus with nettles, log pile, fungi, and butterfly. Illustration from The Hidden Universe: Adventures in Biodiversity by Alexandre Antonelli

Wonky vegetables and fruit
Wonky vegetables and fruit including potatoes, onions, carrots, and apples. Illustration from The Hidden Universe: Adventures in Biodiversity by Alexandre Antonelli

Beavers Castor canadensis
Beavers Castor canadensis with beaver dam. Illustration based in Tierra del Fuego, where introduced beavers have damaged the closed ecosystem. Illustration from The Hidden Universe: Adventures in Biodiversity by Alexandre Antonelli

Oak tree Quercus robur
Oak tree Quercus robur in full leaf. Illustration from The Hidden Universe: Adventures in Biodiversity by Alexandre Antonelli

Coffee plant Coffea arabica
Coffee plant Coffea arabica with flower berry beans. Illustration from The Hidden Universe: Adventures in Biodiversity by Alexandre Antonelli

Hemp cloth string and plant Cannabis sativa
Hemp cloth string and plant Cannabis sativa. Hemp fibres can be used to make tough, linen-like cloth, as well as rope and twine. Illustration from The Hidden Universe: Adventures in Biodiversity by Alexandre Antonelli

Hidden Universe starry sky and treeline
Hidden Universe starry sky and treeline. Illustration from The Hidden Universe: Adventures in Biodiversity by Alexandre Antonelli