Claudio Contreras / Monarch butterfly (Danaus plexippus) hibernating, Mariposa Monarca Special Biosphere Reserve, central Mexico, January.

Claudio Contreras / Monarch butterfly (Danaus plexippus) hibernating, Mariposa Monarca Special Biosphere Reserve, central Mexico, January.

Claudio Contreras / Jumping cholla (Cylindropuntia fulgida fulgida), Rasa Island Special Biosphere Reserve, Sea of Cortez (Gulf of California), Mexico, April

Claudio Contreras / Monarch butterfly (Danaus plexippus) hibernating in Sacred Fir (Abies religiosa) forest, Mariposa Monarca Special Biosphere Reserve, central Mexico, January.

Claudio Contreras / Monarch butterfly (Danaus plexippus) hibernating, Mariposa Monarca Special Biosphere Reserve, central Mexico, January.

Claudio Contreras / Peregrine falcon (Falco peregrinus) flying from rocks, watched by another, Rasa Island Special Biosphere Reserve, Sea of Cortez (Gulf of California) Mexico, April

Claudio Contreras / Peregrine falcon (Falco peregrinus) perched on rocks, Rasa Island Special Biosphere Reserve, Sea of Cortez (Gulf of California) Mexico, April

Claudio Contreras / Elegant tern (Sterna / Thalasseus elegans) pair performing courtship dance amongst breeding colony, Rasa Island Special Biosphere Reserve, Sea of Cortez (Gulf of California) Mexico, April

Claudio Contreras / Elegant terns (Sterna / Thalasseus elegans) mating pair amongst breeding colony, Rasa Island Special Biosphere Reserve, Sea of Cortez (Gulf of California) Mexico, April

Claudio Contreras / Elegant tern (Thalasseus / Sterna elegans) pair courtship display, Rasa Island Special Biosphere Reserve, Sea of Cortez (Gulf of California) Mexico, April

Claudio Contreras / Elegant tern (Thalasseus / Sterna elegans) pair performing courtship dance, excluding a third tern, Rasa Island Special Biosphere Reserve, Sea of Cortez (Gulf of California) Mexico, April

Claudio Contreras / Royal tern (Thalasseus maximus) calling, Rasa Island Special Biosphere Reserve, Sea of Cortez (Gulf of California) Mexico, April

Claudio Contreras / Royal tern (Thalasseus maximus) pair greeting each other, Rasa Island Special Biosphere Reserve, Sea of Cortez (Gulf of California) Mexico, April

Claudio Contreras / Royal tern (Thalasseus maximus) pair, post-mating dance, Rasa Island Special Biosphere Reserve, Sea of Cortez (Gulf of California) Mexico, April

Claudio Contreras / Elegant tern (Thalasseus / Sterna elegans) calling, Rasa Island Special Biosphere Reserve, Sea of Cortez (Gulf of California) Mexico, April

Claudio Contreras / Elegant tern (Thalasseus / Sterna elegans) colony, Rasa Island Special Biosphere Reserve, Sea of Cortez (Gulf of California) Mexico, April/January.

Claudio Contreras / Heermann's gull (Larus heermanni) breeding colony in flight and restless due to presence of pair of Peregrine falcon (Falco peregrinus). Rasa Island Special Biosphere Reserve, Sea of Cortez, Me...

Claudio Contreras / Scientist holding image of Elegant tern (Thalasseus elegans) breeding colony in normal year in front of empty breeding site showcasing the effect of climate change and overfishing. Rasa Island Speci...

Claudio Contreras / Scientist holding image of Elegant tern (Thalasseus elegans) breeding colony in normal year in front of empty breeding site showcasing the effect of climate change and overfishing. Rasa Island Speci...

Claudio Contreras / Heermann's gull (Larus heermanni) breeding colony in flight and restless due to presence of pair of Peregrine falcon (Falco peregrinus). Rasa Island Special Biosphere Reserve, Sea of Cortez, Me...

Claudio Contreras / Heermann's gull (Larus heermanni) colony resting on water after pair of Peregrine falcons (Falco peregrinus) spooked them. Rasa Island Special Biosphere Reserve, Sea of Cortez, Mexico, April.

Claudio Contreras / Landscape of island coast including Jumping cholla cacti (Cylindropuntia fulgida). Rasa Island Special Biosphere Reserve, Sea of Cortez, Mexico. April.

Claudio Contreras / Heermann's gull (Larus heermanni) breeding colony in flight and restless due to presence of pair of Peregrine falcon (Falco peregrinus). Rasa Island Special Biosphere Reserve, Sea of Cortez, Me...

Claudio Contreras / Western side-blotched lizard (Uta stansburiana elegans) basking on rock. Rasa Island Special Biosphere Reserve, Sea of Cortez, Mexico. April.

Claudio Contreras / Jumping cholla cacti (Cylindropuntia fulgida) with Partida and Angel de la Guarda Islands beyond. Rasa Island Special Biosphere Reserve, Sea of Cortez, Mexico. April.

Claudio Contreras / Brown pelicans (Pelecanus occidentalis) flying with Partida and Angel de la Guarda Islands beyond. Rasa Island Special Biosphere Reserve, Sea of Cortez, Mexico. April.

Claudio Contreras / Heermann's gulls (Larus heermanni) choosing and protecting nesting site. Rasa Island Special Biosphere Reserve, Sea of Cortez, Mexico. April.

Claudio Contreras / Osprey (Pandion haliaetus) fledgling strengthening wing in nest. Rasa Island Special Biosphere Reserve, Sea of Cortez, Mexico. April.

Claudio Contreras / Osprey (Pandion haliaetus) in flight. Rasa Island Special Biosphere Reserve, Sea of Cortez, Mexico. April.

Claudio Contreras / Reddish egret (Egretta rufescens) in flight. Rasa Island Special Biosphere Reserve, Sea of Cortez, Mexico. April.

Claudio Contreras / American oystercatcher (Haematopus palliatus) foraging on beach at low tide. Rasa Island Special Biosphere Reserve, Sea of Cortez, Mexico, April.

Claudio Contreras / Scientist holding image of Elegant tern (Thalasseus elegans) breeding colony in normal year in front of empty breeding site showcasing the effect of climate change and overfishing. Rasa Island Spec...

Claudio Contreras / Jumping cholla cacti (Cylindropuntia fulgida.) with Partida and Angel de la Guarda Islands beyond. Rasa Island Special Biosphere Reserve, Sea of Cortez, Mexico. April.

Claudio Contreras / Princely tiger moth (Chrysocale principalis) on pine needle forest floor. Monarch Butterfly Special Biosphere Reserve, Mexico.