We have heard that the residents of the spiritual world can change their forms. “They have assumed forms with colors and shapes similar to those of the Lord they have worshiped as most dear, and even non human forms, such as those of some animals. This verse indicates that Vaikuntha devotees who appear in nonhuman forms, such as those of some animal or plant, have worshiped similar forms of Lord Narayana, who by His expansion appeared in those same species. These devotees, each in his own way, have realized the perfection of sarupya, having attained forms that look just like those of the Supreme Lord.” ( Brhad-bhagavatamrta, Part Two, chapter entitled, “The Spiritual Kingdom,” text 141.)