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## First Understanding: Description of Embryonic Aerial Beings [97 40]
What are aerial beings? Aerial beings are of four types, such as *charmapkshi* (skin-winged) etc., as described previously. Their *avagahana* (range of perception) is from the smallest fraction of an *angula* (finger width) to *dhanupuhutta* (bow-length) in the superior case. Their *sthiti* (duration of life) is from the smallest fraction of an *antarmuhurta* (interval between two moments) to an *asankhyeyabhaga* (incalculable part) of a *palyopam* (a measure of time) in the superior case. The rest is like aquatic beings, as described previously.
Their special characteristic is that these beings go up to the third hell. This is the description of embryonic aerial beings, five-sensed, *tiryanch* (non-human) and *tiyanch* (born from three yonis).
With this, the description of *tiyanch* is complete.
## Discussion [39-40]
These sutras instruct us to understand the differences between terrestrial and aerial beings born from the womb, similar to the differences between *sammuchhim* (non-embryonic) terrestrial and aerial beings. In the *sammuchhim* terrestrial beings, the *prasalika* (a type of serpent) is described in the category of *urparisarp* (serpents with a chest). This should not be mentioned here because *prasalika* is *sammuchhim* and not born from the womb.
Another difference is that in the sutra on *mahorag* (great serpent), the phrase "**joyanasayamp*i *joyanasayapuhuttiya* vi *joyanasahasamp*i" should be added. This means that the *avagahana* of *sammuchhim* *mahorag* is *joyanaprithaktva* (a measure of distance) in the superior case, while the *avagahana* of embryonic *mahorag* is *joyanaprithaktva* and even a thousand *joyanas*.
In all other aspects, the description is similar to embryonic aquatic beings, except for the *avagahana*, *sthiti* and *udvartana* (rebirth).
The superior *avagahana* of quadrupeds is six *kosas* (a measure of distance), the superior *sthiti* is three *palyopamas*, and their *udvartana* is from the fourth hell to the *sahasrar* (highest) heaven. This means that they can be reborn in all the realms between these two points after death.
The superior *avagahana* of *urparisarp* is a thousand *joyanas*, the superior *sthiti* is *purvakoti* (a measure of time), and their *udvartana* is from the fifth hell to the *sahasrar* heaven. This means that they can be reborn in all the realms between these two points after death.
The superior *avagahana* of *bhujparisarp* (serpents with arms) is from two to nine *kosas*, the superior *sthiti* is *purvakoti*, and their *udvartana* is from the second hell to the *sahasrar* heaven. This means that they can be reborn in all the realms between these two points after death.
The differences between embryonic aerial beings, five-sensed, *tiryanch* are similar to *sammuchhim* aerial beings. Their bodies and other aspects are similar to embryonic aquatic beings, except for their *avagahana*, *sthiti* and *udvartana*.
Embryonic aerial beings, five-sensed, *tiryanch*...