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    Nomada bee sitting at tip of plant branch. — Stock Photo
    Nomada bee sitting at tip of plant branch.
    Hydatid disease in liver, cystic echinococcosis, Computer illustration — Stock Photo
    Hydatid disease in liver, cystic echinococcosis, Computer illustration
    Robberfly insect covered by early morning dew. — Stock Photo
    Robberfly insect covered by early morning dew.
    Liver fluke. Computer illustration of adult liver fluke (Fasciola hepatica), parasite of sheep, cattle and humans. Humans ingest fluke larvae by eating infested vegetation — Stock Photo
    Liver fluke. Computer illustration of adult liver fluke (Fasciola hepatica), parasite of sheep, cattle and humans. Humans ingest fluke larvae by eating infested vegetation
    Pegomya bicolor fly from dorsal view at tip of grass blade. — Stock Photo
    Pegomya bicolor fly from dorsal view at tip of grass blade.
    Digital illustration of parasitic hookworm Ancylostoma duodenale in small intestine. — Stock Photo
    Digital illustration of parasitic hookworm Ancylostoma duodenale in small intestine.
    Sarcoptic mange mites eggs — Stock Photo
    Sarcoptic mange mites eggs
    Digital illustration showing close-up of ciliate protozoan Balantidium coli intestinal parasite causing balantidiasis ulcer in human intestinal tract. — Stock Photo
    Digital illustration showing close-up of ciliate protozoan Balantidium coli intestinal parasite causing balantidiasis ulcer in human intestinal tract.
    Digital illustration of nit egg of human head louse attached to human hair. — Stock Photo
    Digital illustration of nit egg of human head louse attached to human hair.
    Close-up of exotic moth perched on branch in tropical forest. — Stock Photo
    Close-up of exotic moth perched on branch in tropical forest.
    Close-up of bag worm moth larval sac covered with twigs. — Stock Photo
    Close-up of bag worm moth larval sac covered with twigs.
    Jellyfish (Pelagia noctiluca) with fish prey photographed during a blackwater scuba dive several miles offshore of a Hawaiian Island at night; Hawaii, United States of America — Stock Photo
    Jellyfish (Pelagia noctiluca) with fish prey photographed during a blackwater scuba dive several miles offshore of a Hawaiian Island at night; Hawaii, United States of America
    House dust mite — Stock Photo
    House dust mite
    Close-up of orange legged furrow bee. — Stock Photo
    Close-up of orange legged furrow bee.
    Dust mite on skin surface — Stock Photo
    Dust mite on skin surface
    Portrait of happy family on vacations on sandy beach — Stock Photo
    Portrait of happy family on vacations on sandy beach
    An extinct marine invertebrate Morocco. Existed during the Cretaceous period. During fossilization the shell was replaced by an iron compound. — Stock Photo
    An extinct marine invertebrate Morocco. Existed during the Cretaceous period. During fossilization the shell was replaced by an iron compound.
    Earthworm coloured scanning electron micrograph — Stock Photo
    Earthworm coloured scanning electron micrograph
    Prionyx kirbii is a genus of wasps in the family Sphecidae, digging a hole to bury their larvae — Stock Photo
    Prionyx kirbii is a genus of wasps in the family Sphecidae, digging a hole to bury their larvae
    Common house dust mite — Stock Photo
    Common house dust mite
    Plankton. Coloured scanning electron micrograph (SEM) of plankton containing mainly Ceratium dinoflagellates. A few diatoms are also present. Dinoflagellates are unicellular protozoans — Stock Photo
    Plankton. Coloured scanning electron micrograph (SEM) of plankton containing mainly Ceratium dinoflagellates. A few diatoms are also present. Dinoflagellates are unicellular protozoans
    Freshwater sponge (Spongilla sp.), coloured scanning electron micrograph (SEM). — Stock Photo
    Freshwater sponge (Spongilla sp.), coloured scanning electron micrograph (SEM).
    Liver fluke. Computer illustration of adult liver fluke (Fasciola hepatica), parasite of sheep, cattle and humans. Humans ingest fluke larvae by eating infested vegetation — Stock Photo
    Liver fluke. Computer illustration of adult liver fluke (Fasciola hepatica), parasite of sheep, cattle and humans. Humans ingest fluke larvae by eating infested vegetation
    Head louse on white background, digital illustration. — Stock Photo
    Head louse on white background, digital illustration.
    Female Asian tiger mosquito, colored scanning electron micrograph. — Stock Photo
    Female Asian tiger mosquito, colored scanning electron micrograph.
    Soft coral colonies growing on reef — Stock Photo
    Soft coral colonies growing on reef
    Entomopathogenic fungus infection on fly in mating position. — Stock Photo
    Entomopathogenic fungus infection on fly in mating position.
    Digital illustration of threadworm in human intestine. — Stock Photo
    Digital illustration of threadworm in human intestine.
    Head louse on human hair, digital illustration. — Stock Photo
    Head louse on human hair, digital illustration.
    Snail Coming Out Shell — Stock Photo
    Snail Coming Out Shell
    Stomach infected with parasitic nematode worms — Stock Photo
    Stomach infected with parasitic nematode worms
    African mantis in threatening pose — Stock Photo
    African mantis in threatening pose
    Long horned bee sleeping on thin branch. — Stock Photo
    Long horned bee sleeping on thin branch.
    Tick showing its mouthparts — Stock Photo
    Tick showing its mouthparts
    Close-up of ladybug larva in pupa stage on stem. — Stock Photo
    Close-up of ladybug larva in pupa stage on stem.
    Detail shot of many oysters — Stock Photo
    Detail shot of many oysters
    Close-up of nomada bee at tip of plant branch. — Stock Photo
    Close-up of nomada bee at tip of plant branch.
    Close-up of hummingbird hawkmoth on lichens covered branch. — Stock Photo
    Close-up of hummingbird hawkmoth on lichens covered branch.
    Hookworm head anatomy — Stock Photo
    Hookworm head anatomy
    Close-up of exotic moth perched on branch in tropical forest. — Stock Photo
    Close-up of exotic moth perched on branch in tropical forest.
    Giant anemone, fuerteventura canary islands — Stock Photo
    Giant anemone, fuerteventura canary islands
    Parasitic louse on human head skin, digital illustration. — Stock Photo
    Parasitic louse on human head skin, digital illustration.
    Red-veined meadowhawk sitting on plant, close-up. — Stock Photo
    Red-veined meadowhawk sitting on plant, close-up.
    An extinct marine invertebrate Morocco. Existed during the Cretaceous period. During fossilization the shell was replaced by an iron compound. — Stock Photo
    An extinct marine invertebrate Morocco. Existed during the Cretaceous period. During fossilization the shell was replaced by an iron compound.
    Close-up of exotic moth perched on branch in tropical forest. — Stock Photo
    Close-up of exotic moth perched on branch in tropical forest.
    Close-up of hatched campopleginae pupa attached on dried wild plant. — Stock Photo
    Close-up of hatched campopleginae pupa attached on dried wild plant.
    Adult dust mite — Stock Photo
    Adult dust mite
    Male human flea — Stock Photo
    Male human flea
    Flatworm Schistosome fluke — Stock Photo
    Flatworm Schistosome fluke
    Light micrograph (LM) of a medusa (young polyp) from the Obelia geniculata hydroid. — Stock Photo
    Light micrograph (LM) of a medusa (young polyp) from the Obelia geniculata hydroid.
    Tapeworm of cattle and other grazing animals, light micrograph. — Stock Photo
    Tapeworm of cattle and other grazing animals, light micrograph.
    Close up of Bushman holding scorpion, Botswana — Stock Photo
    Close up of Bushman holding scorpion, Botswana
    Turnip sawfly sitting on yellow wildflower. — Stock Photo
    Turnip sawfly sitting on yellow wildflower.
    Close-up of exotic moth perched on leaf in tropical forest. — Stock Photo
    Close-up of exotic moth perched on leaf in tropical forest.
    Tiger fly at top of dried wild plant. — Stock Photo
    Tiger fly at top of dried wild plant.
    Spotted eye hoverfly in frontal portrait shot. — Stock Photo
    Spotted eye hoverfly in frontal portrait shot.
    France, Les Moutiers-en-Retz, 44, barnacles hanging on a beacon stranded on the beach after a storm. — Stock Photo
    France, Les Moutiers-en-Retz, 44, barnacles hanging on a beacon stranded on the beach after a storm.
    Grandfather and children at home — Stock Photo
    Grandfather and children at home
    Granite rocks and starfish on the beach, Belitung island, Indonesia — Stock Photo
    Granite rocks and starfish on the beach, Belitung island, Indonesia
    Light micrograph of a waterflea, Daphnia pulex, a small freshwater crustacean. — Stock Photo
    Light micrograph of a waterflea, Daphnia pulex, a small freshwater crustacean.