Thomas Mangelsen / Monarch (Danaus plexippus) butterfly group perching on a female tourist, El Rosario Monarch Butterfly Sanctuary, Mexico

Michael & Patricia Fogden / Yucca Moth (Tegeticula yuccasella) pollinating Yucca flower (Yucca torreyi) and ovipositing, Mexico

Patricio Robles Gil / Accumulated rainwater on a Mafafa leaf in El Cielo Biosphere Reserve in the mountains of the Sierra Madre Oriental, Tamaulipas, northeast Mexico

Patricio Robles Gil / Monarch (Danaus plexippus) butterfly, drinking from pool in wintering grounds, Monarch butterfly Biosphere Reserve, Michoacan, Mexico

Patricio Robles Gil / Maroon-fronted Parrot (Rhynchopsitta terrisi) pair, Cumbres de Monterrey National Park, Nuevo Leon, Mexico

Patricio Robles Gil / Monarch (Danaus plexippus) butterfly, group on moss-covered tree in wintering grounds, Monarch butterfly Biosphere Reserve, Michoacan, Mexico

Patricio Robles Gil / Monarch (Danaus plexippus) butterfly, on moss-covered tree in wintering grounds, Monarch butterfly Biosphere Reserve, Michoacan, Mexico

Patricio Robles Gil / Monarch (Danaus plexippus) butterfly, mass covering a tree trunk in their wintering grounds, Monarch butterfly Biosphere Reserve, Michoacan, Mexico

Patricio Robles Gil / Monarch (Danaus plexippus) butterfly, group on moss-covered tree in wintering grounds, Monarch butterfly Biosphere Reserve, Michoacan, Mexico

Gerry Ellis / Wandering Spider (Cupiennius coccineus) close-up, Mesoamerica

Gerry Ellis / Wandering Spider (Cupiennius coccineus) close up on branch, front view, Mesoamerica

Gerry Ellis / Wandering Spider (Cupiennius coccineus) with egg sac, Mesoamerica

Gerry Ellis / Wandering Spider (Cupiennius coccineus) with egg sac, Mesoamerica

Gerry Ellis / Helmeted Iguana (Corytophanes cristatus) portrait, on branch, Mesoamerica