#263154 - safe, artist:toonidae, knuckles the echidna (sonic), echidna, mammal, monotreme, anthro, sega, sonic the hedgehog (series), 2023, 2d, frowning, looking at you, male, simple background, solo, solo male, unamused, white background

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Main Species Franchises Sexual Interactions Misc.

Genders
male
female
intersex male
intersex female
herm
maleherm
ambiguous gender

Often Forgotten
solo
duo
group
solo male
solo female
human only
not furry
oc
oc only
photo
Tag original characters oc:name

Ratings
safe
suggestive
questionable
explicit
grimdark
grotesque

Fantasy
alicorn
alien
demon
dragon
earth pony
gryphon
monster
pegasus
undead
unicorn

General
arthropod
bird
big cat
canine
dinosaur
equine
feline
fish
mammal
reptile

Misc
hybrid
fictional species
ambiguous species

Specific 1
bear
cat
crocodilian
deer
dog
fox
goat
hedgehog
horse
human

Specific 2
hyena
lion
lizard
otter
pony
rabbit
shark
snake
tiger
wolf

Other
aggretsuko
beastars
lilo & stitch
mario (series)
minecraft
night in the woods
the lion king
touhou
undertale
warrior cats

Form/form
anthro/feral
anthro/anthro
feral/feral
human/anthro
human/feral
human/human
humanoid/anthro
humanoid/feral
anthro/taur
feral/taur

Form/form specifics
anthro on feral
feral on anthro
human on anthro
human on feral
anthro on human
feral on human
humanoid on anthro
humanoid on feral
anthro on humanoid
feral on humanoid

Orientations
male/female
male/male
female/female
bisexual
male/intersex female
intersex female/female
intersex female/intersex male
herm/intersex male
intersex female/intersex female

Backgrounds
simple background
abstract background
gradient background
scenery porn
transparent background
white background

Body coverings
hair
fur
scales
feathers
mane

Eye Colors 1
amber eyes
black eyes
blue eyes
brown eyes
cyan eyes
gray eyes
green eyes
magenta eyes
orange eyes
pink eyes

Eye Colors 2
purple eyes
red eyes
teal eyes
yellow eyes
white eyes
heterochromia
colored pupils
colored sclera
no pupils
slit pupils

Features 1
paws
feet
paw pads
hooves
cloven hooves
claws
talons
beak
antlers
wings

Features 2
horn
horns
fangs
teeth
whiskers
tail
multiple tails

Fluff!
fluff
butt fluff
cheek fluff
chest fluff
ear fluff
head fluff
neck fluff
pubic fluff
shoulder fluff
tail fluff

NSFW
penis
vulva
breasts
nipples
vaginal secretions
cum
erection
balls
animal genitalia
sex

Other
bust
clothes
comic
dialogue
speech bubble
onomatopoeia
outdoors
part of a set
text
watermark

Furbooru

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[img]https://furrycdn.org/img/2023/8/18/263154/full.png[/img] [url=https://furbooru.org/images/263154]View on Furbooru[/url] - [url=https://www.deviantart.com/luvicarious/art/Knock-Knock-It-s-Knuckles-976283500]Original source[/url]

Thumbnailed BBcode Copy
[img]https://furrycdn.org/img/2023/8/18/263154/medium.png[/img] [url=https://furbooru.org/images/263154]View on Furbooru[/url] - [url=https://www.deviantart.com/luvicarious/art/Knock-Knock-It-s-Knuckles-976283500]Original source[/url]

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