New Behaviour

[cyanide]

I purchased a 1.25" cyaneopubecens back in late August. However, tonight when I was feeding it I wanted to take a photo of it with my phone, while my phone was hovering over the deli cup the spiderling started to shake it's abdomen. I'm not sure if this was a reaction to the phone overhead or if it usually does this when biting prey and I just don't notice it because the I'm busy getting the lid back on.
I'm wondering if any one else has noticed this in their own tarantulas.

 

[Nada]

I purchased a 1.25" cyaneopubecens back in late August. However, tonight when I was feeding it I wanted to take a photo of it with my phone, while my phone was hovering over the deli cup the spiderling started to shake it's abdomen. I'm not sure if this was a reaction to the phone overhead or if it usually does this when biting prey and I just don't notice it because the I'm busy getting the lid back on.
I'm wondering if any one else has noticed this in their own tarantulas.

It's a defensive posture. New World speices use urticating hairs as defense rather than biting.

 

[cyanide]

I haven't witnessed that particular defensive posture before. But it does make sense, I'd get pretty defensive if some massive thing hung over me while I was trying to enjoy my meal.