Sling vs. Juvie

annanlove19

Arachnosquire
Joined
Dec 12, 2014
Messages
78
Hey guys,

I was wondering when a T goes from being a sling to being a juvie? I know there's nothing Scientifically Exact and I'm sure it depends on species and such, but if there's a general size consensus? I don't want to be going around referring to a T that's clearly a sling to everyone else as a juvie because I'm dumb.

Thanks ^_^
 

pyro fiend

Arachnoprince
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Dec 29, 2013
Messages
1,216
Im pretty sure the 2" mark is what makes your little T go from a sling to juvie imo its sling till 2" 4-5 is adult 5+ mature(fem only). With exception of large Ts(lasi, poec etc) and dwarvs. Im sure someone elese may have another rule (especially on adult-mature) as aome sp only get about 5ish inch and whatnot but i think juvie is typically 2"-2.5"
 

klawfran3

Arachnolord
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Feb 6, 2013
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645
My rule is: if the spider is less than 1/3 grown it's a sling, around 1/2 a juvie, and then 3/4 and onwards sub adult, and when fully grown... well, you get the picture.

The rule could change here and there depending on different species (like the large ones leave the sling stage earlier since they're so big, opposite for smaller) but all round it works well for describing them.
 

awiec

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Feb 13, 2014
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1,325
I go with a similar system as klaw does, though for my larger species if they are 3+ inches then I call them a juvie as they are in that weird stage of being skittish and bold so I can relate that as more of a "teenage stage". Anything above their half adult size is sub-adult to me.
 

eldondominicano

Arachnobaron
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Dec 8, 2014
Messages
421
For Genus' like aphonopelma, and Grammostola, its easy to determine when they become juvie, but for alot of OW species it seems hard bcause of their coloration even as slings. IMO. But yes you guys are right, the best rule of thumb is 2-3" juvie, etc..
 

TheraMygalo

Arachnopeon
Joined
Mar 20, 2024
Messages
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My rule is: if the spider is less than 1/3 grown it's a sling, around 1/2 a juvie, and then 3/4 and onwards sub adult, and when fully grown... well, you get the picture.

The rule could change here and there depending on different species (like the large ones leave the sling stage earlier since they're so big, opposite for smaller) but all round it works well for describing them.
Almost 10 years later, do most of you use this way to determine if a tarantula is a sling or juvenile? If we take Davus pentaloris and Kochiana brunnipes for example, at 1", would we consider the D pentaloris a sling still, and the K brunnipes a juvie? I find it difficult with "dwarves" to determine which stage they are at and would like some input from current times. Thanks.
 

Ultum4Spiderz

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Oct 13, 2011
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4,810
Almost 10 years later, do most of you use this way to determine if a tarantula is a sling or juvenile? If we take Davus pentaloris and Kochiana brunnipes for example, at 1", would we consider the D pentaloris a sling still, and the K brunnipes a juvie? I find it difficult with "dwarves" to determine which stage they are at and would like some input from current times. Thanks.
A valid reason to resurrect this thread 9 years later . Any pic of this sling ? I’d say if it’s for adult colors it’s a juvy . My guess would be 1.5” is juvy for smaller species . Surely dwarf keepers will help explaining this . :artist:
 

0viWan

Arachnopeon
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Jun 26, 2023
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I tend do refer to my Ts as juvies once they clearly have their adult coloration and look like proper little tarantulas. For my NWs this would be around the 2-3'' mark.
 
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TheraMygalo

Arachnopeon
Joined
Mar 20, 2024
Messages
10
A valid reason to resurrect this thread 9 years later . Any pic of this sling ? I’d say if it’s for adult colors it’s a juvy . My guess would be 1.5” is juvy for smaller species . Surely dwarf keepers will help explaining this . :artist:
I read a bunch of threads. Sifted through conversations here and there, trying to peice up bits and peices of information. I liked this way of vieiwing sizes but also curious about the science of sizing. Especially since we give extra special moisture control care for slings.

“Dwarves” though, I wonder when we can consider them juveniles. To adapt moisture requirements in terms of the species needs.

My 2 D. pentaloris (one molted recently, the other is in pre-molt) and K brunnipes are sporting their adult colors already. Perhaps not as a perfect completed adult, but it is definitely not like my G. Pulchripes 1/3” inch sling at all (freshly molted). That G pulchripes is definitely a sling: it looks like a tiny wet spiderling. I will include pics of all 4 in the order described.
 

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IntermittentSygnal

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Personally, I think Klawfran3 is good. Using the fractional system accounts for dwarves to giants. Some males will mature at smaller sizes, but that is more juvie to sub adult to adult.
 
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