My question is pretty simple that why do some species of armadillos (like three-banded) roll into a ball, while others don't?

  • $\begingroup$ Para 4 $\endgroup$ – Tyto alba Sep 3 '17 at 5:08
  • $\begingroup$ @Tytoalba Thanks! and Yes I know that, perhaps I haven't been able to word my question properly. I am more interested to know about why they were evolved this way (to have less plates, etc.) $\endgroup$ – Failed Scientist Sep 3 '17 at 5:33

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