Tony Phelps / Boomslang (Dispholidus typus) Immature male hunting in thorn bush above deHoop Vlei, Western Cape, South Africa, December
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Stephen Dalton / Mud dauber wasp (Sceliphron caementarium) flying over cactus spines, Everglades NP, Florida, USA
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Jack Dykinga / Close-up of two Barrel cacti (Ferocactus acanthodes) in the eastern Chihuahuan Desert, Mexico
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Jack Dykinga / Dense stands of Prickly pear cactus (Opuntia sp) in Tamaulipas, Mexico
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Rolf Nussbaumer / Common Tree Frog {Hyla arborea} adult resting in wild rose bush, National Park Lake Neusiedl, Austria, April
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Jack Dykinga / Trunks of Saguaro Cacti (Carnegiea gigantea) at sunrise, Cabeza Prieta National Wildlife Refuge, Arizona. January 1st 2000
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Jack Dykinga / Close-up of Agave (Agave montana) with red thorns / spines and interesting patternation on blades, Sierra Madre Oriental mountain range, Tamaulipas, Mexico
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Rolf Nussbaumer / Great Kiskadee (Pitangus sulphuratus) perched on flowering blooming Huisache (Acacia farnesiana), Lake Corpus Christi, Texas, USA. April 2003
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Solvin Zankl / Close up of thorns of Crown of thorns starfish {Acanthaster planci} Sulawesi, Indonesia