Click Here for More Images from iStock- 15% off with coupon 15FREEIMAGES 
Photomicrograph of rotifer, probably Rotaria rotatoria. Rapidly rotating cilia at top of head, internal organs visible. Green circles are algae. Live specimen. Original image at 40X, wet mount, transmitted brightfield illumination. Indistinct image due to motion blur of live specimen and very shallow depth of field of brightfield illumination.
Macrophotography. Animal Photography. Closeup photo of baby Javanese grasshopper perched on hairy skin surface. Baby Javanese Grasshopper or Valanga Nigricornis. Shot in Macro Lens
Horn beetle lying on stomach
Trematode parasite under a microscope
Green aphid isolated on white (around 3mm in length)
Copepod - micro organism
Horsefly or gadfly on white background, extreme close-up
Tipulidae cranefly static photograph from above showing detail intricacy of the body and open wings detail.
Banded Demoiselle on a leaf
A   Large metallic damselfly with fluttering, butterfly-like wings resting in foliage
Microscopic close view of high vaginal swab Gram stain smear, 100x. diagnosis of Bacterial vaginosis (BV).
Ruddy Darter Red Dragonfly perched on a reed leaf in Woodwalton Fen nature reserve.
Algaes under microscopic view
Liver Fluke Section under light microscope with white background
Spore bags of helminthosporium contain 8 cells. This disease causes helminthosporiosis of wheat. Soon very small and quite harmful.
Tiny dragonfly (Zygoptera) perched on a leaf
Copepod with egg sacs. Live specimen. Wet mount, 10X objective, combination of transmitted brightfield illumination.
Close-up of a banded damselfly (Calopteryx splendens) sitting on a blade of grass. The background is blurred and green. The wings are clearly visible.
A mosquito floats on the surface of the water. Macro.
worm
Top view of green dragonfly isolated in white background. Transparent wings insect. Selective focus on bug body.
Bone marrow plasma cells .Plasma cell neoplasms are diseases in which the body makes too many plasma cells. Plasma cell neoplasms can be benign or malignant. Diagnosed with Immunostain CD138 positive.
A macro close-up of parasite Deer fly, Lipoptena cervi, on a hairy sking. It is sometimes called the flying tick.
Chrysoperla carnea Common Green Lacewing Insect. Digitally Enhanced Photograph.
Algae, a unicellular organism
Sciaroidea insect Fossil inside Burmese Amber of Cenomanian Era, 100 million years ago, from the state of Myanmar
Cedar pollen
Daytime macro side-view close-up of a single male banded demoiselle (Calopteryx splendens) damselfy perched on a nettle leafat the waterfront of a brook
Photomicrograph of filamentous blue-green algae, Oscillatoria species. Each band along the stand is one cell. This filament is very short probably having recently parted from a longer one. Filaments are typically many times longer. This algae is mobile, it moves and twists through the water. San Francisco Bay, California, USA. Live specimen. Wet mount, 40X objective, transmitted brightfield illumination. Note - motion blur of live specimen, very shallow depth of field, chromatic aberration and uneven focus are inherent in light microscopy.
Colonies of pathogenic bacteria in a Petri dish, microbiological studies
Free Images: "bestof:Hypercompe testacea.JPG Hypercompe testacea en Arctiinae adults all in dorsal view Novitates Zoologicae http //www archive org/details/novitateszoologi18lond"
Piranga_lutea_testacea_1902.jpg
Cheirogaleus_adipicaudatus_1894.jpg
Lophozosterops dohertyi 1897.jpg
Aglaeactis_aliciae_1897.jpg
Loboparadisea_sericea_1897.jpg
Zoonavena_thomensis_Keulemans.jpg
Melanopareia_elegans_elegans_1897.jpg
BoschTheCrucifixionOfStJulia.jpg
Fromental_Halévy,_L'Éclair_score_cover_-_Restoration.jpg
Chalet View 4.jpg
Dorsal view of an endangered lange metalmark butterfly.jpg
Aviceda_madagascariensis_1868.jpg
Cyanolanius_madagascarinus_1868.jpg
Machaeropterus_regulus_1841.jpg
Nikolay Nikolayevich Karazin.jpg
Calicalicus_madagascariensis_1868.jpg
Philepitta_castanea_1868.jpg
Philepitta_schlegeli_1868.jpg
Alectroenas_sganzini_1868.jpg
Sunrise Street Apr 09.JPG
StGilesCircus.jpg
Boomerang HST big.jpg
Sunrise Front Apr 09.JPG
Pismo Beach.jpg
Coracina_personata_pollens.jpg
Xenopirostris_damii_1868.jpg
Clifford's Tower-2007 1.jpg
Deep Creek Conservation Park 2.jpg
Above martins head.jpg
Sunset in Ducie Island.jpg
HEUraniumC.jpg
Lunar libration with phase Oct 2007.gif
Crestone needle and lower south colony lake 2008.JPG
Hubble Extreme Deep Field (full resolution).png
Lepilemur_mustelinus_1868.jpg
Viverricula_indica_schlegelii_1868.jpg
LyndonJohnson_signs_Voting_Rights_Act_of_1965.jpg
Sunset Wotto Atoll.jpg
Jean-Honoré_Fragonard_-_The_Stolen_Kiss.jpg
William_Giles_-_Lever_du_soleil_à_Stonehenge.jpg
Lunar libration with phase2.gif
Lake floatplane wake.jpg
Mirza_coquereli_1868.jpg
Marion_Post_Wolcott_Blairs_Virginia.jpeg
West Palm Beach station Amtrak train arriving north view.jpg
Beach view north in South Palm Beach Florida 09-03-07.jpg
1962 Rambler Ambassador 2-door sedan Kenosha blue-s.jpg
1962 Rambler Ambassador 2-door sedan Kenosha blue-r.jpg
1962 Rambler Ambassador 2-door sedan Kenosha blue-f.jpg
Pope_Julius_II.jpg
Claude_Monet,_Le_Grand_Canal.jpg
Raffaello Sanzio - Ritratto di Papa Giulio II (National Gallery, London).jpg
A single white feather closeup.jpg
Tuskegee_airmen_2_original.jpg
Thraciae-veteris-typvs.jpg
P S Krøyer 1899 - Sommeraften ved Skagens strand. Kunstneren og hans hustru.jpg
Eremias kavirensis side view.jpg
Paul_Gauguin_-_Self-Portrait_with_Halo_and_Snake.jpg
Michelangelo_Merisi,_called_Caravaggio_-_Saint_John_the_Baptist_in_the_Wilderness_-_Google_Art_Project.jpg
F-18F_after_launch_from_USS_Abraham_Lincoln_(CVN-72).jpg
Sargent,_John_Singer_(RA)_-_Gassed_-_Google_Art_Project.jpg
Edgar_Degas,_Miss_La_La_at_the_Cirque_Fernando,_1879.jpg
بيروت_القرن_١٩_أسود_أبيض.jpg
Panorama_of_San_Francisco_by_Eadweard_Muybridge,_1878.jpg
Stroop Report - Warsaw Ghetto Uprising 06b.jpg
Washington_Crossing_the_Delaware_by_Emanuel_Leutze,_MMA-NYC,_1851.jpg
Seal of Prince George's County, Maryland (1696-1958).svg
Water turbine - edit1.svg
Burlington_Rail_Bridge.jpg
Keokuk_Rail_Bridge.jpg
Piratbyran logo.svg
Piratbyran logo text.svg
James_Brydges,_1st_Duke_of_Chandos_by_Michael_Dahl.jpg
Bellotto,_Bernardo_-_View_of_Pirna_from_the_Sonnenstein_Castle.jpg
Seal of Prince George's County, Maryland (1958-1971).svg
Seal of Prince George's County, Maryland.svg
Gill crater as15-96-13093.jpg
Neumayer crater as15-96-13093.jpg
Demonax crater as15-96-13093.jpg
Reconnaissance_Photo_Aerial_View_Germany.jpg
Portrait_of_Lawrence_Challoner_Garratt_(1874)_by_Henry_Richard_Graves.jpg
Petrov crater as15-96-13093.jpg
Portrait_of_Midshipman_John_Windham_Dalling,_RN_(c_1800)_by_George_Henry_Harlow_-_02.jpg
Vincent_van_Gogh_-_The_Enclosed_Wheatfield_After_a_Storm_F1547_JH1724.jpg
Jeans crater as15-96-13093.jpg
Mnemosyne_(cropped).jpg
Mnemosyne_DAM.jpg
Eugène_Atget_-_Versailles_-_Google_Art_Project.jpg
Eugène_Atget_-_Châtaigniers_-_Google_Art_Project.jpg
Eugène_Atget_-_Fête_du_Trône_-_Google_Art_Project.jpg
Eugène_Atget_-_Fontaine_du_Point_du_Jour,_Versailles_-_Google_Art_Project.jpg
Eugène_Atget_-_Saint_Cloud_-_Google_Art_Project.jpg
Albrecht der Beherzte, 1443-1500 (AT KHM GG4796).jpg
Miss_or_Mrs_Townsend_(c_1794),_attributed_to_Gainsborough_Dupont.jpg
Dante_Gabriel_Rossetti_Veronica_Veronese.jpg
Veronica_Veronese_DAM.jpg
Flag of Croatia for discussion.svg
Portrait_Group_of_the_Smith_Children_on_a_Terrace_with_a_Spaniel,_Basket_of_Flowers_and_a_Parakeet_(c_1718)_by_James_Maubert.jpg
Veronica_Veronese_DAM_cropped.jpg
Half-age-plus-seven-relationship-rule.svg
Terms of Use   Search of the Day