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By on December 1, 2008, with 66 Comments

Bob Guckert from Pittsburgh (USA) emailed one of his discoveries. It’s a logo for the Pittsburgh Zoo. Apparently, he found out that the logo holds an interesting optical illusion. He knew of this picture for sometime, but only after visiting our website, he started to see things differently. This is what Bob wrote in his email: “This is an optical illusion I have seen for many years, but didn’t notice till I started visiting your website. Thanks for making me aware of my surroundings”. If you remember, Mira foundation had a similar poster for it’s own campaign. Illusion works same way Rubin’s Vase works, and all other similar illusions we posted earlier, are just a variation of the same principle. So, can you spot the illusion hidden in the poster below? It’s easy!

Pittsburgh Zoo Optical Illusion


66 Responses
  1. KEVIN says:

    I see the fish at the bottom and the 2 animals in the white spots on either side of the tree.

  2. Anonymous says:

    I see a gorilla and a Lion as white shapes.

  3. melfp2004 says:

    there are two lions too, male and female.

  4. Anonymous says:

    Found it, pretty cool!

  5. Anonymous says:

    2 fishes
    2 birds
    1 gorila
    1 lion

  6. Anonymous says:

    Yeah, I’m from Pittsburgh and I noticed this illusion about 6 or 7 years ago, I’m surprised they haven’t changed the logo of the zoo yet. It is clever though, so I guess thats why they haven’t.

  7. Anonymous says:

    ….and a partridge in a pear tree…..

  8. moe says:

    in the upper part there seems to be a streched version of the world map

    nice one!

  9. Michel says:

    I can’t figure out what’s in the left…

  10. Anonymous says:

    I see 2 fish at the bottom, 2 birds, 2 lions at both sides of the tree and I think there’s also a whale at the bottom on the left. I don’t see a gorilla…where is it? Oh and on the top on the left side…I think I see a sqirrel.

  11. Anonymous says:

    I think there are:
    2 fish
    1 whale
    2 lions, a male and a female
    2 birds
    1 squirrel

  12. escaped convict says:

    that is pretty cool. i love illusions like this, they are so clever. and unusual ones like this are better than the vase one you see all the time. i can also see how you wouldn’t necassarily see the illusion if you weren’t looking for it- it’s subtle.
    found them all, keep up the good work!

  13. Anonymous says:

    nice. very nice.

  14. Anonymous says:

    Disney’s Animal Kingdom has trash cans with a logo that have a similar effect. You can find a picture of these cans here: http://farm1.static.flickr.com/229/465732658_ef28ecb7e1.jpg?v=0.

  15. Ken says:

    Wow! Did anybody notice between all the animals, there’s a big TREE????? Or is it all in my imagination?

  16. Anonymous says:

    i see a dionsaur and a hand and a person

  17. Raymundo says:

    You would say I’m a crazy, but I see a eagle´s wing in the root

  18. Anonymous says:

    cool illusion

  19. Emily O says:

    From my home city! Awesome! I never noticed either..

  20. Anonymous says:

    same thing what anonymous said

  21. Anonymous says:

    IT'S A MONKEY & A LION! And then there's fishes at the bottom!

  22. Andrew R. says:

    This reminds me of the Old Milwaukee Brewers logo: http://www.sportslogos.net/images/logos/54/64/full/1179.gif

    When I was a kid my mom showed me the “m” and the “b” in the glove. I had never noticed it before she pointed it out.

  23. DIVA says:

    i see the gorilla and the tiger and the two fish at the bottom

  24. Anonymous says:

    i really think its a big tree below all of that

  25. Anonymous says:

    I see:
    2 birds,
    2 fish,
    a gorilla,
    a lion,
    a whale,
    a horse head, a hedgehogand a baby chick in the leaves,
    a slug,
    a squirel,
    a big cat head in the branches,

    and a crocodile head at the bottom where the fish are (fish are in its mouth)
    very cool

  26. KC says:

    I see a panda. Does anyone else or is it just me?

  27. scottt says:

    is it just me, or are there a bunch of little critters in the branches of the tree. i think i see a snail and a giraffe

  28. Anonymous says:

    Can you please tell me where you find all these animals? I can only see the birds and the fishes…

  29. Anonymous says:

    Does it not seem that there is a woman at the bottom? I don’t know. x]

  30. Grizzlyironbear says:

    i just LOVE these, and i get even a bigger kick out of the comments that follows…especially when people “see” things that just arent there :) This design has a BIG tree, the outline of both a gorilla and a lioness, with the two birds flying above the tree, and two fish leaping out of the water UNDER the tree. After checking with the zoo officials, THAT IS IT…there is no more hidden animals in the logo…But, still…VERY nicely done.

  31. Anonymous says:

    ok the fish and birds are intentionally in there, duhh. gosh you guys are dumb.
    theres two lions though, on either side of the tree

  32. Waffles says:

    Lion and Gorilla. I wonder if the people who made this logo know about this.

  33. Anonymous says:

    i see a gorilla and a lion at the trunk of the tree and fish at the bottom of it in the roots.

  34. Anonymous says:

    All I can see is a couple of birds at the top and a couple of fish at th bottom!!!!!!!

  35. Anonymous says:

    … it looks a girl lying on the floor with her hand straight up holding something. She has her legs bent though!!

  36. Logan says:

    i see a lady with trees for arms

  37. Hot Stuff says:

    Tee Hee. I see…


    2 birds

    a Gorrilla

    a Lion (female)

    and a small little giraffe in one of the wholes in the branches.

  38. purplepeopleeater says:

    i dont see any ficken whales i see the fish` the birds the lion the gorilla i think people are going crazy or maybe im going crazy i think it might be the second one

  39. !!me!! says:

    i see
    1 a lioness
    2 a gorilla (other side of tree)
    3 2 fishies:) (bottom of tree)
    4 2 birds (top of tree)
    5 a tree :)
    6 if you see at the side of tree, you see half a fish lol :D :P
    7 Vurdlak, is that all i need to see? plz tell me!!

  40. Chelsea says:

    i thought it was a woman at the bottom of the tree and her arms ar the tree hehe silly me

  41. koopaflower says:

    when i first saw it, i thought its only a tree@

  42. unknown says:

    its the same concept as the classic goblet illusion
    and anyway i spot the 2 big animals at the 2 sides of the tree before even seeing the tree

  43. Anonymous says:

    I thought it was 2 people ahving sex at the trunk of the tree.

  44. Emily Jacobs says:

    if you close your eyes so your vision is blurry you can see two tigers on ether side of the tree

  45. Someone says:

    Hey Have You Notice A Face With Blood

  46. Anbonymous says:

    There are two birds above the tree, a lioness, a gorilla and yes, the two fish leaping out of water at the bottom.

  47. Gabby-Maddi says:

    Gabby: The Monkey and the Lion are gonna make out…
    Maddi: Theres a girl in the tree washing. No seriously, shes there.

  48. yallaredumb says:

    PEOPLE, WUT R U SMOKING? There are no 2 lions! there is a gorilla and a lion! Proof that there is a gorilla /Pittsburgh_Zoo_%26_PPG_Aquarium_logo.svg There is not aligator, or a slug, or a whale, and probably not a giraffe! Pittsburgh_Zoo_%26_PPG_Aquarium_logo.svg

    • Sergey says:

      Sorry for getting into the conversation so late. If you look at the silhouette of the second bunch of leaves and branches from the left at the top of the tree you can clearly see a walking bear with head on the left and tail with hind leg on the right of that bunch. As for the rest – you’re absolutely right I think…

  49. allison says:

    i think its a gorilla and a TIGER not a lion.

  50. Nyra says:

    All i see is the two heads and the two fish!!!
    Pretty cool!!!1

  51. Michelle says:

    I see a girl holding a bouquet of flowers when i tilt my head to the right!

  52. yy3e5fg3e says:

    yep looks like 2 tigers or animals facing off and 2 small fish in background jumping

  53. Uncle Bob says:

    Lioness is on the right and gorilla in on the left. Two fish and No Girls or flowers…. Hmm…

  54. Anonymous says:

    I see a gorilla, a lion/leopard, a rhino, a horse, a frog, a giraffe, a butterfly, a croc, two birds, two fish, a slug, a horse/zebra, and a howler monkey so far… :) epic cool!!!

  55. Becky says:

    ohhh I see the fish now

  56. CuppyCake says:

    I dont see the girl with the flowers, but i see the fish and the 2 animal heads

  57. Mr. idgaf. says:

    2 fishes
    1 gorila
    1 Tiger
    And my mother in law.

  58. uh says:

    all i see is fishes but really lions?!?!? a gorilla?!?!?And a tiger ?!?!?!?!

  59. itsme says:

    I found the:

    Lion:1(That weird thing on the left of the tree)
    Man:1(Somewhere around the Gorillas nose, it looks like a mans tied to the tree)

    Im suprised no one noticed the crocodile,(except one) its the first one i noticed. ( The 2 fish are his open mouth)

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