Yes. The smaller the t the harder it is to tell. Whrn theyre mayure you dont even need a microscope just look for a slot above the booklungs and if u see a slot(for mate enterance) you have a female. Another way to tell is when your male is ready to mate, embolis will come out of his from two pedipalps and hell use this to build a sperm web and deposit his sperm in. So if u see ur tsrantula building a web with visible hooks on his front pedipalps(Male fahsho) females are also bigger than males so look up the male a female average max size and that could help. But with a great microscope( i wouldnt try to sex a sling)you can have a juvenile and take the molt, open up the abdomen and look for the sperm pocketDoes a tarantula need to be a certain age before telling gender is present under a microscope?
Thank you!
i haven’t logged in in a while…@Theneil uses a microscope if I recall. Perhaps he may be able to give you some insight on the topic.