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Mostly you can't. Sexual dimorphism is the exception rather than the rule among butterflies (unlike birds.) So most species look pretty much alike and are difficult to tell apart. (Although they know, and that's what really matters.) Among sexually dimorphic species, the differences can be as subtle as the color of the antennae or as dramatic as looking like completely different species. Whatever the differences, they can be learned. And then it's easy to tell.
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How can you know without dissection whether you are studying a male or female fetal pig?
A male has a scrotal sac and a female does not.
How can you identify whether a skeleton is male or female?
The pelvis is a key indicator for determining the sex of a skeleton. In general, male pelvises are more robust and narrower, while female pelvises are wider and have a broader pubic angle. Additionally, other indicators such as skull features and long bone dimensions can also be considered.
In a dioecious plant at the seedling level how to know whether it is a male or female plant?
that depents on which plant it is
What must a Samurai know in order to be successful?
Whether their opponent is male or female... Foot to the balls!
How do you know if your dwarf rabbit is male or female?
You can find out whether your dwarf rabbit is male or female in the same ways that you can find out whether any pet rabbit is male or female -- dwarfs are no different from other rabbits in this sense. See the related question (linked below) for details and links.
How do you know if chameleons are female or male?
how do you know if your pygmy chameleon is a male or a female
Is a female faster then a male?
It depends on the specific person. It doesn't matter whether they are male or female.
Do sperm cells have a gender?
As far as I know, they don't however they are the deciders of whether the offspring is either a male, or a female.
What is the difference between male and female fingerprints?
Each fingerprint is different whether it be male or female, it does not matter.
Is los a male or female pronoun?
Many people do not know whether or not los is a female or male pronoun in spanish. it is known that los is a plural mal pronoun due to spanish classes that people attend.
Where to shop clothes in Thailand?
Depends on whether you are looking for male, female or she-male.
What is the name of a female pilot?
Whether male or female, the word pilot is used.
