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clouded yellow butterfly (Colias croceus) perched on a flower with blurred background
A common Sulphur  in its natural environment in the Laurentian forest in Canada.
A beautiful common sulphur butterfly (Colias philodice) perched atop a vibrant yellow wildflower
Close shot of a Colias croceus, clouded yellow feeding on the nectar of Armeria maritima the sea pink.
Yellow butterfly Colias sucks nectar on Diphtrichia viscose
a dogface butterfly perching on a yellow flower
butterfly on the flower in spring
Wildflowers
the sow thistle is a weed
Cremanthodium Benth(垂头菊) growing at Sankoh Prairie(桑科草原), Gansu Province, China
Flying monks
A cloudless sulphur butterfly gathers nectar from a purple flower in Costa Rica.
Orange sulfur butterfly or Colias eurytheme on perennial sunflower. The daisy-like perennial flowers are smaller than their annual cousins, but they are profuse and long-lasting.
Large White in Termessos National Park, Large Cabbage White
A profile view of a yellow butterfly with folded wings feeding from a wildflower in central Texas.
Clouded Sulphur Butterfly
Cloudless Sulphur Butterfly on leaf
A Checkered White butterfly feeds on nectar from yellow daisies in Big Bend national park.
Colias croceus  in spring
Small yellow butterfly on a yellow daisy flower
Eurema hecabe, the common grass yellow, is a small pierid butterfly species found in Asia, Africa and Australia
Colias hyale, the pale clouded yellow resting on a scabious.
Butterflies - Clouded Sulphur Backlit on Goldenrod
Orange Sulphur Butterfly
Cloudy Sulfer butterflies feeding on Downy Ragged Goldenrod
yellow butterfly
yellow sulphur
Mountain wildflower, Pyrenees, Andorra
Pale Clouded Yellow Butterfly
An image of a Large White butterfly nectaring in sunlight
Free Images: "bestof:SULPHUR, CLOUDED (Colias philodice (8-24-12) dunton meadow, near lizard head, dolores co, co (1) ALAN SCHMIERER ALAN SCHMIERER"
LIZARD,_BLUNT-NOSED_LEOPARD_(gambelia_sila)_(6-6-13)_lincoln_co,_nv_(1).jpg
LIZARD,_BLUNT-NOSED_LEOPARD_(gambelia_sila)_(6-6-13)_lincoln_co,_nv_(2).jpg
LIZARD,_BLUNT-NOSED_LEOPARD_(Gambelia_sila)_(3-30-08)_van_metre_wash,_carrizo_plain_national_monument,_slo_co,_ca_-2.jpg
EGRET,_SNOWY_1-12-06_morro_bay,_slo_co,_ca.jpg
SPOTTED_CORALROOT_(Corallorhiza_maculata)_(6-16-12)_douglas_co,_or_-02.jpg
449_-_BARN_OWL_(7-03_10)_los_osos,_slo_co,_ca.jpg
883_-_SAVANNAH_SPARROW_(6-1-13)_estero_bluffs,_slo_co,_ca_(1).jpg
449_-_BARN_OWL_(11-21-08)_carrizo_plain,_slo_co,_ca.jpg
954_-_BRAMBLING_(12-24-2014)_arcata,_humboldt_co,_ca_-01.jpg
871_-_CHIPPING_SPARROW_(11-18-2015)_Patagonia_Lake,_Santa_Cruz_Co,_AZ.jpg
885_-_BAIRD;S_SPARROW_(11-16-2014)_san_rafael_grasslands,_santa_cruz_co,_az.jpg
CROW,_AMERICAN_(3-21-10)_elephant_seal_vista,_slo_co,_ca_-02.jpg
OWL,_BARN_(9-1-09)_mu_ranch,_carrizo,_slo_co,_ca_-02.jpg
700_-_SINALOA_WREN_(9-6-13)_huachuca_cyn,_huachuca_mts,_cochise_co,_az_-01.jpg
910_-_HEPATIC_TANAGER_(12-18-13)_huachuca_canyon,_cochise_co,_az_-01.jpg
700_-_SINALOA_WREN_(12-18-13)_huachuca_canyon,_cochise_co,_az_-02.jpg
704_-_BLACK-CAPPED_GNATCATCHER_(5-4-2015)_female,_florida_wash,_pinal_co,_az_-01.jpg
845_-_RUFOUS-CAPPED_WARBLER_(1-13-14)_florida_wash,_pima_co,_az_-_06.jpg
845_-_RUFOUS-CAPPED_WARBLER_(1-13-14)_florida_wash,_pima_co,_az_-_01.jpg
845_-_RUFOUS-CAPPED_WARBLER_(1-13-14)_florida_wash,_pima_co,_az_-_08.jpg
845_-_RUFOUS-CAPPED_WARBLER_(1-13-14)_florida_wash,_pima_co,_az_-_13.jpg
845_-_RUFOUS-CAPPED_WARBLER_(1-13-14)_florida_wash,_pima_co,_az_-_03.jpg
CIBOLA_NAT_WILDLIFE_REFUGE,_south_of_Blyth,_CA_(3-6-14)_la_paz_co,_az_(2).jpg
700_-_SINALOA_WREN_(12-18-13)_huachuca_canyon,_cochise_co,_az_-04.jpg
WHITE,_GREAT_SOUTHERN_(Ascia_monuste)_(2-20-13)_pelican_island_nat_wildlife_refuge,_indian_river_co,_fl_(1).jpg
SWALLOWTAIL,_WESTERN_TIGER_(Papilio_rutulis)_6-16-11)_carcass_cr,_wayne_co,_ut_(1).jpg
885_-_BAIRD'S_SPARROW_(11-13-2015)_san_rafael_grasslands,_santa_cruz_co,_az_-01.jpg
704_-_BLACK-CAPPED_GNATCATCHER_(5-4-2015)_female,_florida_wash,_pinal_co,_az_-02.jpg
885_-_BAIRD'S_SPARROW_(4-25-2015)_san_rafael_grasslands,_santa_cruz_co,_az_-16.jpg
826_-_MAGNOLIA_WARBLER_(12-17-13)_tanque_verde_wash,_tucson,_pima_co,_az_-06.jpg
704_-_BLACK-CAPPED_GNATCATCHER_(11-23-2014)_sonoita_creek_state_natural_area,_santa_cruz_co,_az_-01.jpg
704_-_BLACK-CAPPED_GNATCATCHER_(11-23-2014)_sonoita_creek_state_natural_area,_santa_cruz_co,_az_-02.jpg
704_-_BLACK-CAPPED_GNATCATCHER_(11-23-2014)_sonoita_creek_state_natural_area,_santa_cruz_co,_az_-04.jpg
826_-_MAGNOLIA_WARBLER_(12-17-13)_tanque_verde_wash,_tucson,_pima_co,_az_-05.jpg
826_-_MAGNOLIA_WARBLER_(12-17-13)_tanque_verde_wash,_tucson,_pima_co,_az_-02.jpg
826_-_MAGNOLIA_WARBLER_(12-17-13)_tanque_verde_wash,_tucson,_pima_co,_az_-07.jpg
SWALLOWTAIL,_EASTERN_TIGER_(Papilio_glaucus)_(2-24-13)_male,_kissimmee_lake_state_park,_osceola_co,_fl_(4).jpg
SWALLOWTAIL,_EASTERN_TIGER_(Papilio_glaucus)_(2-24-13)_male,_kissimmee_lake_state_park,_osceola_co,_fl_(2).jpg
704_-_RUBY-CROWNED_KINGLET_(11-18-2014)_patagonia_lake,_santa_cruz_co,_az_-01.jpg
934_-_YELLOW-HEADED_BLACKBIRD_(11-18-2014)_with_redwing_and_great-tailed_blackbirds,_patagonia_lake,_santa_cruz_co,_az_-02.jpg
839_-_BLACK-THROATED_GRAY_WARBLER_(11-23-2014)_sonoita_creek_state_natural_area,_santa_cruz_co,_az_-01.jpg
700_-_SINALOA_WREN_(12-18-13)_huachuca_canyon,_cochise_co,_az_-06_carrying_nesting_material.jpg
035_-_WHITE-CHEEKED_PINTAIL_(2-20-13)_pelican_island_nat_wildlife_refuge,_indian_river_co,_fl_-03.jpg
858_-_OLIVE_SPARROW_(3-5-12)_laguna_atascosa_nat_wildlife_refuge,_near_laguna_vista,_tx_(2).jpg
NIGHT_SNAKE_(hypsiglena_torquata)_with_possible_PLATEAU_STRIPED_LIZARD_(cnemidophorus_velox)_(6-13-09)_southern_utah_or_maybe_arizona.jpg
SANTA_ANA_NAT_WILDLIFE_REFUGE,_near_Mc_Allen,_Tx_-06.jpg
SANTA_ANA_NAT_WILDLIFE_REFUGE,_near_Mc_Allen,_Tx_-04.jpg
CRESCENT,_PHAON_(Phycoides_phaon)_(3-7-12)_santa_anna_national_wildlife_refuge,_near_mc_allen,_tx_(1).jpg
CRESCENT,_PHAON_(Phycoides_phaon)_(3-7-12)_santa_anna_national_wildlife_refuge,_near_mc_allen,_tx_(2).jpg
ADMIRAL,_RED_(Vanessa_atalanta)_(3-7-12)_santa_anna_national_wildlife_refuge,_near_mc_allen,_tx_(2).jpg
438_-_WHITE-TIPPED_DOVE_(3-7-12)_santa_anna_national_wildlife_refuge,_near_mc_allen,_tx_(2).jpg
221_-_HARRIS'S_HAWK_(3-5-12)_laguna_atascosa_nat_wildlife_refuge,_near_laguna_vista,_tx_(3).jpg
228_-_WHITE-TAILED_HAWK_(3-5-12)_laguna_atascosa_nat_wildlife_refuge,_near_laguna_vista,_tx.jpg
438_-_WHITE-TIPPED_DOVE_(3-5-12)_laguna_atascosa_nat_wildlife_refuge,_near_laguna_vista,_tx_(2).jpg
SKIMMER,_ROSEATE_(Orthemis_ferruginae)_(3-7-12)_santa_anna_national_wildlife_refuge,_near_mc_allen,_tx_-05.jpg
SKIMMER,_ROSEATE_(Orthemis_ferruginae)_(3-7-12)_santa_anna_national_wildlife_refuge,_near_mc_allen,_tx_-02.jpg
PONDHAWK,_PIN-TAILED_(Erythemus_plebeja)_(3-7-12)_santa_anna_national_wildlife_refuge,_near_mc_allen,_tx_-05.jpg
PONDHAWK,_PIN-TAILED_(Erythemus_plebeja)_(3-7-12)_santa_anna_national_wildlife_refuge,_near_mc_allen,_tx_-01.jpg
SQUIRREL,_EASTERN_FOX_(Sciurus_niger)_(3-7-12)_santa_anna_national_wildlife_refuge,_near_mc_allen,_tx_-01.jpg
HERON,_GREAT_BLUE.jpg
KILLDEER_(2-1-11)_ca_-01.jpg
LUPINE_(4-1-13)_patagonia,_az_-01.jpg
027_-_AMERICAN_WIGEON_(12-18-13)_albuquerque,_nm_-01.jpg
023_-_WOOD_DUCK_(12-18-13)_albuquerque,_nm_-05.jpg
023_-_WOOD_DUCK_(12-18-13)_albuquerque,_nm_-03.jpg
023_-_WOOD_DUCK_(12-18-13)_albuquerque,_nm_-12.jpg
ROCK_CORRAL_CANYON_-_Atascosa_Mts_(12-22-13)_(3).jpg
VIEW_FROM_THE_HOUSE_-_0233_(11-14-2014).jpg
DRAGONLET,_BAND-WINGED_(Erythrodiplax_umbrata)_(3-7-12)_santa_anna_national_wildlife_refuge,_tx_-04.jpg
DRAGONLET,_BAND-WINGED_(Erythrodiplax_umbrata)_(3-5-12)_santa_anna_national_wildlife_refuge,_tx_-01.jpg
POPPY,_CALIFORNIA_(eschscholzia_californica)_(4-24-10)_carrizo_plain_nat_mon_-03.jpg
867_-_BOTTERI'S_SPARROW_(12-20-2014)_nogales_cbc,_patagonia_lake_ranch_estates,_scc,_az_-09.jpg
WREN,_SEDGE_(11-27-10)_lower_thumb_rock_cove,_pena_blanca_lake,_scc,_az_-01b.jpg
ORIOLE,_STREAK-BACKED_(6-11-11)_78_circulo_montana,_patagonia_lake_ranch_estates,_scc,_az_-10.jpg
ELFIN,_BROWN_(Callophrys_augustinus)_(2-9-14)_lower_humboldt_cyn,_patagonia_mts,_scc,_az.jpg
867_-_BOTTERI'S_SPARROW_(1-8-14)_camino_los_vientos,_patagonia_lake_ranch_estates,_scc,_az_-01a.jpg
867_-_BOTTERI'S_SPARROW_(1-8-14)_camino_los_vientos,_patagonia_lake_ranch_estates,_scc,_az_-02b.jpg
791_-_CHESTNUT-COLLARED_LONGSPUR_(1-5-14)_tank_at_mexican_border,_san_rafael_grasslands,_scc,_az_-05.jpg
549_-_AMERICAN_KESTREL_(1-5-14)_san_rafael_grasslands,_scc,_az_-01.jpg
STARTHROAT,_PLAIN-CAPPED_(9-5-10)_Paton's_yard,_Patagonia,_scc,_az_-02.jpg
SPARROW,_BAIRD'S_(12-24-10)_san_rafael_grasslands,_scc,_az_-01.jpg
FROG,_CHIRICAHUA_LEOPARD_(Rana_chiricahuensis)_(9-25-11)_pena_blanca_lake,_scc,_az_-_02.jpg
YELLOW,_BARRED_(Eurema_daira)_(11-22-12)_harshaw_road_rabbitbrush,_patagonia_mts,_scc,_az_-01.jpg
BLUE,_ACMON_(Plebejus_acmon)_(11-22-12)_harshaw_road_rabbitbrush,_patagonia_mts,_scc,_az_-02.jpg
FROG,_CHIRICAHUA_LEOPARD_(Rana_chiricahuensis)_(9-25-11)_pena_blanca_lake,_scc,_az_-_01.jpg
SWEAT_BEE,_sp_(Augochloropsis_sp)_(9-5-11)_78_circulo_montana,_patagonia_lake_ranch_estates,_scc,_az_-04.jpg
SWEAT_BEE,_sp_(Augochloropsis_sp)_(9-5-11)_78_circulo_montana,_patagonia_lake_ranch_estates,_scc,_az_-02.jpg
CARPENTER-BEE,_VALLEY_(Xylocopa_varipuncta_)_(7-12-11)_78_circulo_montana,_patagonia_lake_ranch_estates,_scc,_az_-01.jpg
PHALAROPE,_RED_(9-15-10)_Bog_Hole_Wildlife_Area,_south_of_Patagonia,_scc,_az_-08.jpg
PHALAROPE,_RED_(9-15-10)_Bog_Hole_Wildlife_Area,_south_of_Patagonia,_scc,_az_-03.jpg
342_-_340_-_RED_&_WILSON'S_PHALAROPE_(9-15-10)_Bog_Hole_Wildlife_Area,_south_of_Patagonia,_scc,_az_(2).jpg
342_-_RED_PHALAROPE_(9-15-10)_Bog_Hole_Wildlife_Area,_south_of_Patagonia,_scc,_az_(2).jpg
342_-_RED_PHALAROPE_(9-15-10)_Bog_Hole_Wildlife_Area,_south_of_Patagonia,_scc,_az_(5).jpg
340_-_WILSON'S_PHALAROPE_(9-15-10)_Bog_Hole_Wildlife_Area,_south_of_Patagonia,_scc,_az.jpg
PYGMY-BLUE,_WESTERN_(Brephidium_exile)_(11-22-2014)_las_cienegas_national_conservation_area,_pima_county,_az_-02.jpg
PHALAROPE,_RED_(9-15-10)_Bog_Hole_Wildlife_Area_south_of_Patagonia,_scc,_az_-14,_with_Wilson's.jpg
867_-_BOTTERI'S_SPARROW_(1-22-14)_survey_bird_L,_lado_de_loma,_lake_patagonia_ranch_estates,_scc,_az_-06.jpg
867_-_BOTTERI'S_SPARROW_(1-22-14)_survey_bird_M,_lado_de_loma,_lake_patagonia_ranch_estates,_scc,_az_-04.jpg
867_-_BOTTERI'S_SPARROW_(1-22-14)_survey_bird_L,_lado_de_loma,_lake_patagonia_ranch_estates,_scc,_az_-01.jpg
DUSKYWING,_MOURNFUL_(Erynnis_funeralis)_(12-27-13)_78_circulo_montana,_patagonia_lake_ranch_estates,_scc,_az.jpg
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