FURVERT!

2010 abs animal_genitalia anthro balls biceps biped black_pawpads blue_body blue_eyes blue_fur blue_hair canid canine canis chest_tuft claws erection fangs fur genitals grey_nose grin hair humanoid_genitalia humanoid_penis looking_at_viewer male mammal muscular muscular_anthro muscular_male neodokuro nude pawpads paws pecs penis pose presenting sheath simple_background sitting smile solo teeth toe_claws tuft vein white_body white_fur wolf

2012 4:5 abs accessory anthro athletic ball_gag balls bdsm biceps big_balls big_muscles big_penis biped bondage bound brown_body brown_fur brown_hair erection fangs felid fur gag gagged genitals hair humanoid_genitalia humanoid_penis kneeling knuxlight lion male mammal mane muscular muscular_anthro muscular_male nipples nude pantherine pecs penis penis_accessory penis_bow penis_ribbon presenting pubes ribbons simple_background solo submissive submissive_male tan_body tan_fur teeth yellow_eyes

2011 abs alien animal_genitalia animal_penis anthro athletic balls biceps big_balls big_penis biped black_body black_fur black_nose blue_body blue_fur bodily_fluids canid canine canine_genitalia canine_penis doggie_kruger erection flexing fur genital_fluids genitals green_background grey_eyes grin hands_behind_head knot leaking lying male mammal muscular muscular_anthro nude on_back pecs penis pepsi_man_(artist) pose power_rangers precum presenting raised_leg sheath simple_background smile solo spread_legs spreading vein veiny_penis white_body white_fur

2012 accessory anthro balls big_penis biped bottomwear brown_body brown_fur clothed clothing erection eyes_closed felid fur genitals hair humanoid_genitalia humanoid_penis lion male mammal mane muscular muscular_anthro muscular_male necktie open_clothing open_shirt open_topwear pantherine pants pecs penis pepsi_man_(artist) pose presenting shirt sitting solo thick_penis topwear vein veiny_penis

2011 abs animal_genitalia animal_penis anthro balls biceps big_penis biped black_penis brown_body brown_fur deja-blu equid equine equine_genitalia equine_penis erection flared_penis fur genitals green_eyes hair hooves horse looking_at_viewer male mammal muscular muscular_anthro muscular_male nipples nude pecs penis pose presenting sheath solo spread_legs spreading vein white_body white_fur

1:1 2012 abs animal_genitalia anthro athletic balls biceps big_muscles biped black_hair blue_eyes bodily_fluids clamories claws cum cum_on_penis cum_string cumshot dragon dripping ear_piercing ejaculation erection european_mythology fangs genital_fluids genital_slit genitals hair hands-free hi_res humanoid_genitalia humanoid_penis jewelry kneeling leaking male masturbation muscular muscular_anthro muscular_male mythological_creature mythological_scalie mythology necklace non-mammal_balls nude open_mouth orgasm pecs penis piercing pose presenting red_body red_skin reptile scales scalie sheath solo tail teeth text toe_claws tongue vein veiny_penis western_dragon

2013 4:5 abs anthro balls biceps biped black_nipples black_nose bodily_fluids canid canine canis chest_tuft clamories claws cum cum_on_penis cum_string cumshot ejaculation erection fur genital_fluids genitals grey_body grey_fur hi_res humanoid_genitalia humanoid_penis male mammal masturbation muscular muscular_anthro muscular_male nipples nude one_eye_closed orgasm pecs penile penile_masturbation penis pose presenting red_penis solo standing thought_bubble tuft wink wolf yellow_eyes

2010 abs anthro athletic balls bemani biceps big_muscles big_penis biped black_nose canid canine canis erection fangs fur genitals grey_body grey_eyes grey_fur grey_hair grin hair humanoid_genitalia humanoid_penis konami male mammal muscular muscular_anthro muscular_male nipple_piercing nipples nude pecs penis pepsi_man_(artist) piercing pop'n_music pose presenting shishitugu_(pop'n_music) sitting smile solo spread_legs spreading teeth thick_penis tongue vein wolf

2012 abs animal_genitalia animal_penis anthro balls biceps biped black_pawpads chest_tuft claws erection felid fur genitals green_body green_eyes green_fur green_hair green_nose grin hair hybrid kiyoshi_(character) knot liger lion lying male mammal mane mike_(artist) mismatched_animal_penis mismatched_genitalia mismatched_penis muscular muscular_anthro muscular_male nipples nude on_back pantherine pawpads paws pecs penis pose presenting pubes sheath simple_background smile solo stripes teeth tiger toe_claws tuft white_background

2013 abs anthro athletic biceps big_muscles biped bottomwear brown_body brown_fur brown_nose bulge bunic cheetah cheetahpaws_(character) clothed clothing cloud ear_piercing eyewear fangs felid feline flexing fur goggles green_eyes grin hair looking_at_viewer male mammal markings muscular muscular_anthro muscular_male nipples open_mouth orange_hair outside pecs piercing pose shorts sky smile solo speedo spots standing sunny swimwear tan_body tan_fur teeth tongue topless water wet whiskers

2013 abs anthro athletic bandage biceps big_muscles biped black_nose blue_body blue_clothing blue_fur blue_underwear boxer_briefs bulge bunic canid canine canis clothed clothing fur hi_res looking_at_viewer male mammal muscular muscular_anthro muscular_male pecs pose scar simple_background solo standing topless underwear white_body white_fur wolf yellow_background yellow_eyes

5:6 abs anthro armor armpit_hair athletic balls biceps big_muscles biped body_hair bottomless bovid bovine brown_hair chest_tuft clothed clothing disney european_mythology flaccid flexing fur gargoyles genitals greek_mythology grey_body grey_fur hair hi_res hooves horn male mammal max777 maxx777 minotaur mohawk muscular muscular_anthro muscular_male mythology nude pecs penis pose pubes raised_leg solo standing taurus_(gargoyles) topwear tuft vambrace vest

abs anthro arody backsack balls biceps big_penis biped bovid bovine butt disney ear_piercing erection european_mythology flexing foreskin gargoyles genitals greek_mythology grin hooves horn humanoid_genitalia humanoid_penis male mammal minotaur mohawk muscular muscular_anthro muscular_male mythology nude partially_retracted_foreskin penis piercing pose presenting rear_view smile solo standing taurus_(gargoyles) vein

abs animal_genitalia anthro armor athletic balls biceps big_muscles biped black_hair boots bottomwear bovid bovine bulge chest_tuft clothing cloven_hooves disney european_mythology flaccid flexing footwear fur gargoyles genitals greaves greek_mythology grey_body grey_fur grin hair hooves horn loincloth male mammal max777 maxx777 minotaur mohawk muscular muscular_anthro muscular_male mythology nipples nude pecs penis penis_tip pose pubes sheath shoes smile solo standing taurus_(gargoyles) topwear tuft vambrace vest

abs animal_genitalia animal_penis anthro athletic balls biceps big_muscles big_penis biped black_hair bodily_fluids bovid bovine clothing cum cum_string cumshot disney ear_piercing ear_ring ejaculation equine_genitalia equine_penis erection european_mythology fur gargoyles genital_fluids genitals gloves greek_mythology grey_body grey_fur hair handwear horn leaking looking_at_viewer male mammal masturbation minotaur mohawk multiple_piercings muscular muscular_anthro muscular_male mythology nipple_piercing nipple_ring nipples nude open_mouth orgasm pecs penile penile_masturbation penis piercing pose presenting pubes ring_piercing scar sheath simple_background solo standing taurus_(gargoyles) teeth text tongue url vp1940 white_background

2013 abs anthro biceps big_muscles biped blue_and_white bulge clothed clothing detailed_bulge disney flexing flower flower_in_mouth fur genital_outline horn kyuuhari lying male monochrome monster monsters_inc monsters_university muscular muscular_anthro muscular_male nipples on_back pecs penis_outline pixar plant pose presenting rose_(flower) rose_in_mouth solo sulley topless

2011 4_toes abs action_pose anthro armor athletic biceps bottomwear cirez claws clothed clothing dragon fangs feet green_eyes grin hindpaw horn karate kick male muscular muscular_anthro mythological_creature mythological_scalie mythology open_mouth pants pawpads paws pecs pink_pawpads pose raised_leg red_body red_skin reptile scales scalie simple_background smile solo spidersnax tail teeth toe_claws toes tongue topless white_background

2013 3:4 4_toes animal_genitalia animal_penis anthro armpit_hair balls balls_in_underwear biceps big_feet biped bird's-eye_view black_body black_fur black_hair black_nose black_sheath body_hair bottomwear boxer_briefs briefs brown_body brown_eyes brown_fur canid canine canine_genitalia canine_penis canis chest_tuft claws clothed clothing digital_media_(artwork) digitigrade dutch_angle electronics featureless_chest feet full-length_portrait fur furniture genitals grin hair hand_behind_head headphones hi_res high-angle_view hindpaw looking_at_viewer lying male mammal muscular muscular_anthro muscular_male on_back on_side orange_bottomwear orange_clothing pawpads paws pecs penis penis_poking_out penis_tip pink_penis portrait pose pyrocloud reclining red_body red_fur relaxing sheath sheath_poking_out smile sofa solo toe_claws toes topless tsaiwolf tuft underwear warm_colors wolf

2013 anthro big_butt bleach_(series) brown_body brown_fur butt candy canid canine canis clothing dessert english_text food fur growth huge_butt hyper hyper_butt looking_at_viewer male mammal marker_(artwork) muscular muscular_anthro muscular_male open_mouth overweight overweight_anthro overweight_male pecs pose prisonsuit-rabbitman sajin_komamura sequence shinigami_uniform smile solo text traditional_media_(artwork) wolf yellow_eyes

2013 3:4 4_toes abs anthro balls barefoot beach biceps biped bodily_fluids cirez claws countershading cum cum_on_penis detailed_background dragon dream_and_nightmare erection feet genital_fluids genitals green_eyes hands_behind_head happy high-angle_view humanoid_genitalia humanoid_penis leaking looking_at_viewer lying male muscular muscular_anthro muscular_male mythological_creature mythological_scalie mythology nude nude_beach on_back on_ground on_towel outdoor_nudity outside pecs penis pink_penis plantigrade precum presenting red_body red_nose red_scales reptile sand scales scalie sea seaside sharp_teeth smile solo tail tan_body tan_skin teeth toe_claws toes towel vein water

anthro blue_eyes braided_hair claws eye_patch eyewear felid fur hair hi_res league_of_legends lion looking_at_viewer male mammal muscular muscular_anthro muscular_male nam_(valckiry) pantherine rengar_(lol) riot_games sharp_teeth simple_background solo teeth tencent white_background white_body white_fur

2013 4:5 5_fingers 5_toes abs anthro armband barefoot bikini biped blue_eyes blue_hair blue_theme bracelet claws clothed clothing cool_colors eye_through_hair feet female feralise fingers front_view hair hair_over_eye jewelry long_hair looking_at_viewer mammal membrane_(anatomy) multicolored_hair muscular muscular_anthro muscular_female mustelid navel necklace one_eye_obstructed otter side-tie_bikini side-tie_clothing side-tie_swimwear skimpy smile solo string_bikini swimwear teeth toe_claws toes translucent translucent_hair triangle_bikini two-piece_swimsuit two_tone_hair underwater water webbed_feet

2013 anthro anus arm_tuft biped black_body black_fur black_skin blush braixen butt canid cheek_tuft digital_drawing_(artwork) digital_media_(artwork) dipstick_tail error facial_tuft female female_anthro fluffy fluffy_tail fur generation_6_pokemon genitals glistening happy humanoid_genitalia humanoid_vulva inner_ear_fluff looking_at_viewer looking_back low-angle_view mammal markings multicolored_body multicolored_fur muscular muscular_anthro muscular_female narrowed_eyes nintendo nude nude_anthro nude_female object_in_tail orange_body orange_eyes orange_fur orange_nose orange_tail pokemon pokemon_(species) portrait presenting presenting_hindquarters presenting_vulva rear_view seigen shaded shadow shoulder_tuft simple_background smile snout solo source_request standing stick stick_in_tail tail tail_markings thick_thighs three-quarter_portrait tuft two_tone_tail unavailable_at_source vulva white_background white_body white_fur wide_hips wood yellow_body yellow_fur yellow_tail

2013 aaron_(artist) anthro armpit_hair balls biceps big_balls big_penis biped black_border bodily_fluids body_hair border bulge clothed clothing detailed_bulge digital_drawing_(artwork) digital_media_(artwork) erection erection_under_clothing flexing genital_fluids genital_outline genitals hand_behind_head hi_res horn huge_penis humanoid_genitalia humanoid_penis looking_at_viewer male mammal monochrome muscular muscular_anthro muscular_male nipples pecs penis penis_outline pose precum rhinoceros signature simple_background sketch smile solo standing teeth thick_penis tight_clothing vein veiny_penis white_background wrestling_singlet

2013 5_fingers animal_genitalia animal_penis anthro balls barefoot biped black_body black_fur black_nose black_skin blue_cum blue_eyes bodily_fluids canid canine canine_genitalia canine_penis canis colored_cum cum cum_on_belly cum_on_body cum_on_chest cum_on_face cum_on_hand cum_on_own_face cum_on_penis cum_on_self cum_string cumshot digital_media_(artwork) ejaculation erection feet fingers fur genital_fluids genitals glistening gloves_(marking) grey_body grey_fur happy heart_symbol inside jonas-puppeh knot looking_at_viewer male mammal markings muscular muscular_anthro muscular_male navel nude open_mouth orgasm pecs penis pink_body pink_penis pink_skin raised_arm shadow sharp_teeth sitting smile solo spread_legs spreading teeth unusual_bodily_fluids unusual_cum unusual_genital_fluids white_body white_fur wolf

anthro belly belt biceps biped black_hair black_nose blush bodily_fluids brown_body brown_fur bulge canid canine clothed clothing erection erection_under_clothing fur genital_fluids genitals hair holding_object looking_away male mammal mohawk musclegut muscular muscular_anthro muscular_male open_mouth overweight overweight_anthro overweight_male pecs penis pouches precum precum_through_clothing pubes raccoon_dog shiba-kenta simple_background solo stain standing sweat tanuki thigh_belt thong topless underwear vein wet wet_clothing white_background zunguri_kenta

5_fingers 5_toes anthro black_hair blue_body blue_fur canid canine canis clothed clothing darkwolf_(character) feet fingers footwear fur gloves grey_background grey_nose hair handwear male mammal multicolored_body multicolored_fur muscular muscular_anthro muscular_male red_eyes sandals shoes simple_background skimpy solo speedo stripes swimwear tail toes topless unknown_artist wolf

2013 5:6 animal_genitalia animal_penis anthro balls biceps biped black_body black_fur black_nose bottomwear canid canine canine_genitalia canine_penis canis claws clothed clothing eye_contact fur genitals hair kuro_(anakuro) long_hair looking_at_another looking_at_viewer male mammal muscular muscular_anthro muscular_male pants pecs penis penis_tip presenting sheath smile solo standing topless virtyalfobo wolf

2013 anthro belly bleach_(series) brown_body brown_fur candy canid canine canis clothing dessert english_text food fur growth looking_at_viewer male mammal marker_(artwork) morbidly_obese morbidly_obese_anthro morbidly_obese_male muscular muscular_anthro muscular_male obese obese_anthro obese_male open_mouth overweight overweight_anthro overweight_male pecs pose prisonsuit-rabbitman sajin_komamura sequence shinigami_uniform smile solo text traditional_media_(artwork) wolf yellow_eyes

2013 5_toes anthro anthrofied balls barefoot biped black_body black_penis black_skin blue_body blue_nose blue_skin canid canine erection feet fur furfrou generation_6_pokemon genitals humanoid_feet looking_at_viewer male mammal matcha_ookami muscular muscular_anthro muscular_male natural_furfrou nintendo nipples nude pecs penis pink_body pink_penis pink_skin plantigrade pokemon pokemon_(species) pokemorph red_eyes simple_background solo standing toes white_background white_body white_fur

anthro avian bird blue_eyes breasts female fire generation_6_pokemon genitals hands_on_hips hi_res mega_blaziken mega_evolution muscular muscular_anthro muscular_female nintendo non-mammal_breasts pokemon pokemon_(species) pose shiroepsilon solo third-party_edit vulva wide_hips

abs anthro anthrofied artist_collaboration biceps biped brown_body brown_fur brown_hair clothed clothing disney felid fur grin hair jesonite lion male mammal mane muscular muscular_anthro muscular_male night nude pantherine pecs pose rock saiyagina simba_(the_lion_king) smile solo standing tan_body tan_fur the_lion_king topless topless_male

2013 abs anthro athletic balls bgn biceps big_muscles big_penis biped bodily_fluids claws cloud countershading crocodile crocodilian cum cum_on_belly cum_on_body cum_on_chest cum_on_face cum_on_hand cum_on_own_face cum_on_penis cum_on_self cum_string cumshot digital_media_(artwork) dripping ejaculation erection eyewear eyewear_only fangs flexing genital_fluids genitals glasses green_body green_skin grin hand_behind_head hi_res horn humanoid_genitalia humanoid_penis league_of_legends leaking lifeguard male masturbation muscular muscular_anthro muscular_male nipples non-mammal_balls non-mammal_nipples nude open_mouth orgasm outside pecs penile penile_masturbation penis pool_party_renekton pose presenting renekton reptile rescue_buoy riot_games scales scalie sitting sky smile solo spread_legs spreading sunglasses sunglasses_only sunny teeth tencent tongue yellow_body yellow_skin

2013 anthro balls bear biceps big_muscles big_penis biped brown_bear canid canine dialogue english_text erection fur genitals grizzly_bear hair hi_res kisuke_mineo looking_at_viewer male mammal maxime-jeanne muscular muscular_anthro muscular_male nipples nude pecs penis pose smile solo text ursine

2012 abs anthro athletic balls biceps biped clothed clothing digital_media_(artwork) domestic_cat erection felid feline felis genitals glopossum humanoid_genitalia humanoid_penis looking_at_viewer male mammal monochrome muscular muscular_anthro pecs penis simple_background sitting sketch solo tattoo topless towel white_background

2013 anthro beach biped blizzard_entertainment bovid bovine detailed_background erection genitals iggi lying male mammal marhawa muscular muscular_anthro muscular_male nude outside penis sand seaside solo tail tauren warcraft

2013 anthro balls biped bovid butt caprine domestic_sheep erection femboy genitals looking_at_viewer lying male mammal muscular muscular_anthro muscular_femboy muscular_male nude on_back pecs penis presenting sheep smile solo wide_hips yellow_eyes zeeka

absurd_res age_difference all_fours anal anal_penetration anthro anthro_on_anthro anthro_penetrated anthro_penetrating anthro_penetrating_anthro balls black_hair blue_body blue_fur breasts canid canine canis digital_media_(artwork) doggystyle duo english_text erection female female_penetrated from_behind_position funta fur genitals hair hi_res interspecies larger_female larger_penetrated looking_at_another looking_at_partner looking_back male male/female male_penetrating male_penetrating_female mammal mature_anthro mature_female max_blackrabbit muscular muscular_anthro muscular_female muscular_male nude older_female older_penetrated one_eye_closed open_mouth penetration penile penile_penetration penis penis_in_ass pink_tongue pounding_ass raven_hunt sex size_difference smaller_male text thrust_lines thrusting tongue tongue_out vkyrie wolf younger_male

1:1 2013 5_fingers absurd_res animal_genitalia animal_penis anthro balls biceps big_penis biped bodily_fluids bowl brown_body brown_fur brown_hair brown_nose brown_skin canid canine canine_genitalia canine_penis container cooking_with_cum counter cum cum_as_food cum_in_bowl cum_in_container cum_in_mouth cum_inside cum_on_arm cum_on_face cum_on_food cum_on_hand cum_on_leg cum_on_penis cum_on_tongue detailed_background digital_media_(artwork) dipstick_tail drinking drinking_cum egg erection excessive_cum excessive_genital_fluids fingers fluffy fluffy_tail food food_fetish food_play fox fur furryratchet genital_fluids genitals glistening gloves_(marking) grasp hair happy hi_res indoor_nudity inside kitchen kitchen_utensils knot licking looking_at_viewer male mammal markings messy muscular muscular_anthro muscular_male nude nude_anthro nude_male orange_body orange_fur pecs penis pink_body pink_penis pink_skin presenting shadow sheath short_hair sitting smile solo spread_legs spreading tail tail_markings text tongue tongue_out tools url werefox_(character) whisk white_body white_fur yellow_eyes

after_sex anthro aquatic bodily_fluids breasts butt cum cum_inside female fish genital_fluids hi_res kurochi long_tail looking_at_viewer messy muscular muscular_anthro muscular_female no_pupils non-mammal_breasts nude nyjasca outside presenting rear_view shark small_breasts solo spread_legs spreading tail

3:4 abs anthro athletic belt biceps big_muscles biped bottomwear bracelet brown_body brown_fur brown_hair brown_nose chest_tuft claws clothed clothing fangs felid fur hair jewelry lion loincloth male mammal mane muscular muscular_anthro muscular_male open_mouth pantherine pecs simple_background solo standing tan_body tan_fur teeth tongue topless tuft wildheit wristband yellow_eyes

2013 abs anthro biceps big_muscles biped black_nose blue_body blue_fur bulge canid canine canis claws clothed clothing fur looking_at_viewer lying male mammal muscular muscular_anthro muscular_male on_back pecs pose reclining rielity solo spread_legs spreading topless underwear white_body white_fur wolf yellow_eyes

2006 abs abstract_background anthro belt biceps biped bottomwear brown_body brown_fur chain claws clothed clothing collar fur furniture gloves hair handwear jewelry male mammal markings marsupial muscular muscular_anthro muscular_male orange_hair pecs pendant pose shorts simple_background sitting smile solo stripes table thumbclawz thylacoleo toe_claws topless vombatiform

2007 2:3 abs anthro biceps biped bottomwear clothed clothing fur loincloth male markings muscular muscular_anthro muscular_male nipple_piercing nipples pecs piercing pose scesmoon sketch solo standing stripes thumbclawz topless

anthro barefoot biped blue_eyes bottomwear brown_body brown_penis brown_skin buckteeth button_(fastener) claws clothed clothing ear_piercing erection feet fur genitals glistening hair holding_penis humanoid_genitalia humanoid_penis kannos looking_at_viewer male mammal masturbation murid murine muscular muscular_anthro muscular_male orange_body orange_nose orange_skin pants partially_clothed pecs penile penile_masturbation penis penis_poking_out penis_through_fly piercing pink_body pink_penis pink_skin rat rodent shadow shirt short_hair simple_background solo source_request standing tan_body tan_fur tan_hair tank_top teeth toe_claws topwear vein whiskers white_background

1:1 abs anthro balls biceps biped brown_body brown_fur brown_hair brown_nipples erection front_view fur genitals gradient_background hair hair_over_eyes haplorhine humanoid_genitalia humanoid_penis male mammal melee_weapon monkey muscular muscular_anthro muscular_male nipples nude pecs penis polearm pose presenting primate pubes simple_background slypon solo staff standing tan_body tan_fur weapon

2_penises abs anthro aquatic athletic balls biceps big_muscles big_penis biped blue_eyes blue_penis diphallism erection fangs fin fish front_view genitals glistening grey_body grey_skin grin hi_res horizontal_diphallism looking_at_viewer male multi_genitalia multi_penis muscular muscular_anthro muscular_male navel nipples non-mammal_balls nude pecs penis pose presenting shark sitting slypon smile solo spread_legs spreading tail tapering_penis teeth vein

2013 adios anthro balls biceps biped blue_eyes bodily_fluids body_hair canid canine canis chest_tuft collar digital_media_(artwork) domestic_dog dripping erection foreskin fur genital_fluids genitals happy_trail holding_penis humanoid_genitalia humanoid_penis leaking looking_at_viewer male mammal musclegut muscular muscular_anthro muscular_male navel nipples nude partially_retracted_foreskin pecs penis pit_bull pose precum pubes slightly_chubby solo standing tuft vein

2013 adios anthro balls bear beard biceps biped blonde_hair blush bodily_fluids brown_bear bulge chest_tuft clothed clothing digital_media_(artwork) erection facial_hair fur genital_fluids genitals grizzly_bear hair humanoid_genitalia humanoid_penis letterbox licking licking_lips licking_own_lips male mammal muscular muscular_anthro muscular_male overweight overweight_anthro overweight_male penis precum pubes self_lick sitting solo spread_legs spreading tattoo tongue tongue_out topless tuft underwear ursine

2013 abs anthro balls bear biceps big_muscles big_penis biped black_nose brown_bear brown_body brown_fur canid canine erection fangs foreskin fur genitals grin grizzly_bear hair hi_res humanoid_genitalia humanoid_penis kisuke_mineo looking_at_viewer male mammal maxime-jeanne muscular muscular_anthro muscular_male nipples nude pecs penis pose presenting retracted_foreskin smile solo standing teeth text thick_penis ursine