“But on 10th March, an Oriental White-eye (Zosterops palpebrosus) perched on the guava tree and then hesitantly moved to the top of the bath tub "
“It appeared very vigilant and cautious and after making sure that there was no enemies nearby, it plunged into the water and took a fanatical bath. After flapping its wings four to five times, it flew to the nearby Chakotra tree (Citrus maxima) and started grooming its feathers.
It was a fascinating sight for me as I have read in field guides that white-eyes are completely arboreal and do not descend on the ground.”
It may be arboreal but the bird needs a bath and it needs to come to the ground for it.