leaf insects head turning black????

[Mike]

My leaf insects head is turning all black and i think hes gonna die... anyone know what causes this?

 

[wuwu]

i don't know why but two of my phyllium spec. nymphs just died and i have no idea why. i believe they are L2. this is supposedly the easiest species of leaf insect to keep too. :?

 

[Mike]

YEA ? its head turned black and it slowly died? =\ none seems to know on the forum since noone replied so iunno?