ANIMAL expressions

ALPHABETICAL

A

An albatross around one's neck
see you later aligator / after a while, crocodile

no se hizo la miel para la boca del asno

B
blind as a bat
Like a bat out of Hell.\clickbait

beastly weather.
batshit crazy
Spelling-bee
The bee's knees
A busy bee
A little bird told me
A bird in the hand is worth two in the bush

bear hug

in the belly of the beast
Bee in your bonnet
Make a beeline for

un bicho raro (a strange cat)

bichear (snoop, stalk, get nosy) ("bichéanos")
to kill two birds with one stone
The early bird catches the worm = Camarón que se duerme se lo lleva la corriente
Birds of a feather flock together

The birds and the bees

free as a bird

blood in the water (sharks)
to bug out (bugging out)

to bug someone
he gave me the bug

As snug as a bug in a rug
to catch the bug
Bullseye
Bull-headed
Bullshit!
like a bull in a china shop = elefante en una cacharreria
to take the bull by the horns

playboy bunny
the Easter Bunny

butterflies in your stomach

burro (terco) = bullheaded


C
la inmortalidad del cangrejo
arrojar perlas a los cerdos
echar margaritaas a los cerdos

cash cow
Chickens come home to roost
As the crow flies
Don't count your chickens before they hatch (no vengas la piel del oso antes de cazarlo)
Like a chicken with its head cut off
Wild goose chase
Chicken or egg
the straw that broke the camel's back
Cat got your tongue?
Curiosity killed the cat
There is more than one way to skin a cat
Let the cat out of the bag
Raining cats and dogs
catcalling
fat cats

a strange cat (un bicho raro)
no hay que buscarle la quinta pata al gato = (if it aint broke, dont fix it)

the cat´s meow
to be chicken, to chicken out
Which came first, the chicken or the egg?
dont count your chickens before they hatch 

happy as a clam

hacer la cobra (to recoil)

crab at someone

Crocodile tears

As happy as a clam

*crickets*

Sacred cow

D
Go to the dogs
In the doghouse

doggybag

like a deer in headlights
you can´t teach an old dog new tricks
Top dog
You can't teach an old dog new tricks
Hair of the dog that bit you
A dog is a man's best friend
Barking up the wrong tree
Cry havoc and let slip the dogs of war
Let sleeping dogs lie.
sheepdogging

to have your ducks in a row
the ugly duckling
sitting duck

lame duck session (pato cojo)
to dovetail with something

E
spread eagle
Goose Egg
Golden Egg / Nest Egg
(wtd)?
All your eggs in one basket
last one in is a rotten egg
Elephant in the room
white elephant
Seeing pink elephants

F
fresh off the boat
Something´s fishy.  (hay gato encerrado?)
Drink like a fish
A fish out of water
A fish rots from the head down
A woman needs a man like a fish needs a bicycle
Give a man a fish and you will feed him for a day.  Teach a man to fish, you´ll feed him for a lifetime. 
flea market
fly in the soup 

like a fly on shit
A fly in the ointment
fly on the wall
dropping like flies = muriendo como grillos
like a fly on shit
wouldn´t hurt a fly

a frog-strangler
to ruffle someone's feathers

G

That really gets my goat!
to have the memory of a goldfish

800 lb gorilla

buscar la quinta pata al gato
to be the guinea pig
goose bumps
to take someone on a wild goose chase. 

[up] to the gills [with]

HIJK

Red herring
"1 dia a la vez digo yo cuando la cosa se pone de color de hormiga"

stirring the hornet's nest
trojan horse
a workhorse
straight from the horse´s mouth
a horse of a different color
Get off your high horse (bájate del burro?)
Beating a dead horse
Don´t look a gift horse in the mouth
Dark horse
Hold your horses!
If wishes were horses, beggars would ride
You can lead a horse to water but you can't make it drink.
horsetrading
jack ass
a kangaroo court

LMNO

ladrando de hambre

A leopard cannot change its spots
the lion´s share
lion-hearted
feed someone to the lions
to put your head in the lion´s mouth
fight like a lion
estoy al loro
ir a matacaballo = to go at breakneck speed
whack-a-mole

si por las moscas
Like a moth to a flame
monkey business / to monkey around
monkey suit
Monkey see, monkey do ("culo veo, culo quiero"?)

quiet as a mouse
a monkey on your back
making a mountain out of a mole hill
empty nester
Ostrich effect
Night owl

The world is your oyster.

strong as an ox.

P
como un pavo.   (indiferente)
When pigs fly
like a pig in mud
pig out
piggy bank
to piggyback off someone or something
puppy dog eyes

proud as a peacock.
like a pig in mud
to parrot somebody
pony up
pigs (police)
playing possum

R
rabbit´s foot

rabbit food

going down a rabbit hole
the rabbit hole (madriguera)
fuck like rabbits

a toro pasado = monday morning quarterbacking
to rat someone out, to rat on someone
the ratrace

S

Jump the shark

drunk as a skunk
to snake something together (to connect multiple cables)

Counting sheep
feeling slugglish
snake
snake eyes (dice roll: 1 and 1)
Swan song

Black sheep of the family

the dark sheep
snail mail

T
a tiger cannot change its stripes

to go cold turkey
Cold turkey
tiger mom, tiger parenting

tuck tail
with your tail between your legs
chasing your tail
being tailed by someone / to have a tail
to have the tiger by the tail (to be in a difficult situation you cant get out of)

tuck tail
the tail end
to have one's tentacles in different places/areas

UVWXYZ
to wing it
to take someone under your wing

opening a can of worms
to weasel out of something (comadreja)
vulture funds = fondos buitre
to wolf something down
cry wolf

A wolf in sheep's clothing: un lobo con piel de cordero