This is my 15 month old Ambilobe, chillin' in the guava tree. I am assuming that guava is safe. I have seen a lot of pictures from Hawaii with Jacksons in guava trees, both wild and captive. Tell me if I am wrong.
No, he is too mellow, except when I show him one of my females. But then he is too preoccupied to pose. Here is a sleeping color shot of him (after a shed). He gets even more yellow when he sees the girls.