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Thread: Sexing Blue tongue lizards

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    Reptiles101's Avatar
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    Sexing Blue tongue lizards

    This question must be asked a lot, but I want to know what's the easiest, safest and accurate way to sex a blue tongue lizard.
    P.s not spending heaps on probing

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    There is no easy way. Any method of sexing Blueys require experience.
    and probing isn't really a good option...
    Herps.... an itch that just never goes....

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    So if probing is not a good option, how would i tell if its male or female?

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    interaction with other blueys is the easiest way, most aged wild ones are easier to after years of experience, fat captive ones can be more difficult... as I said there are various ways but they require some skill and a lot of experience
    Herps.... an itch that just never goes....

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    morrie is offline Regular Member
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    what about DNA/chromosome testing? if there is such a thing?

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    glennh is offline Regular Member
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    Hi, dont know how true this is but many years ago i was told that the lighter the belly means male where more colour or tint is female,
    Any body else heard this?

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    The best way to sex them is to look for the sperm plug( I think it's called) when it poops. But you could also try the interaction thing.

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    MrFireStorm is offline Regular Member
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    Although not 100% accurate, I use a couple of different methods which of course all depends on age and size.

    1. The distance between front and rear legs can be used. Generally if there is a longer distance between the legs can determine a female (due to extra room required to carry babies. Males are generally shorter in distance.


    2. Head width is also an option. Females tend to have a narrower head width where as males are broader (boofier). This can be down to a couple of different opinions.
    a. Human females will try and tell you that all males are boofheads, but I prefer;
    b. Males have a larger brain therefore need the larger head to be able to fit the brain.

    Of course, these are just my opinions.

    Daz

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    jinjajoe's Avatar
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    Quote Originally Posted by Hazordous-Herps View Post
    The best way to sex them is to look for the sperm plug( I think it's called) when it poops. But you could also try the interaction thing.
    True but if housed with a male a female can have a sperm plug during the mating season.

    Probing is pointless as I probed a bunch of animals of proven sex and females sometimes probed deeper than males and vice-versa.

    The best way in my opinion is to build a case one way or the other based on the following 5 visible pointers;

    1. Tail length and width (longer and thinner tails = males & shorter wider = females)
    2. Head size (bigger pointier heads = males & smaller rounder heads = females)
    3. Broader shoulders & narrow hips = males & narrow shoulders wider hips = females
    4. Defined hemi-pene bulges = males & lack of hemi-pene bulges = females
    5. & of course mating activity etc.

    ALL of these 5 points need to be considered and a case built there on. As Jason said fat captive specimens can skew results which is why a multiple of indicators are needed.

    In addition neonates have no method of sexual determination to date.
    dragonlover1 likes this.

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    Reptiles101's Avatar
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    My blue tongue lizard had a poo this morning and i noticed these like white long things in his/her poo, my question is what are they?Attachment 271510

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    the photo's didn't work but likely they are the calcium/caltrate part of the the waste which is a good thing because it means your lizard is getting enough calcium.
    Sexing a blue tongue is usually done by looking at the tail,females have a shorter thicker tail than the male but it is not always as easy as that;we have had a bluey for several years who we thought was male by this method(and we have had several blueys including pregnant female)but after brumation this year suddenly went woohh she's a girl
    slave to central & pygmy beardies + australorp chickens

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    There like these slimy white long things, that are next to the poo.
    I thought they might be sperm plugs or something.

    - - - Updated - - -

    Attachment 271549Here is the pic hope it works this time
    Last edited by Reptiles101; 24-Nov-12 at 05:06 PM.

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