because the caterpillers have to eat the leafs)*
i don't know the proper answer, but i know butterflies use their feet to taste if the leaf is good enough to lay eggs on.
Most lay them on leaves so that when the catipillars are hatched, they have leaves to munch on. Some lay them on water too, depending on the type of butterfly. Aas for the actual laying though, that's a quick process of 'spurting' the eggs out on to the area they are laying.
I can not tell you without actually seeing them. However Moths and Butterflies tend to lay their eggs on the underside of leaves. These will hatch into small caterpillars that will the feed on your morning glory leaves, making holes in them as they feed and grow. Different species of Moths and Butterflies used different plants as the food source for their young and seek out specific types of plant to lay their eggs on. If you are interested watch for the caterpillars to hatch and grow, these are much easier to identify then the eggs.
butterfly
Caterpillars cannot lay eggs. They go through metamorphosis and transform into butterflies or moths, which are the ones that lay eggs. Butterflies and moths lay eggs on leaves or other surfaces, usually in clusters or rows.
cause that's what they do
No, Lady bugs lay their eggs on the underside of leaves.
Walking sticks usually lay their eggs in the soil, or on the underside of leaves.
Butterflies lay eggs.
Monarch butterflies lay their eggs on milkweed plants. The milkweed plant is the only food source for monarch caterpillars, so this is where the female butterflies choose to lay their eggs.
Most butterflies lay their eggs on plants: on the top or bottom of leaves, on the flowers, on twigs, in the chinks of bark, or on the plant stalk. Some butterflies lay their eggs near the plant: on dry grass stems, dead leaves, or on soil. By laying their eggs on or near plants, the newly hatched caterpillars will have something to eat.
You should know this, but if you don't, butterflies lay eggs on leaves. They are so smart, they know where to put their eggs. If the butterflies doesn't know and puts it in a random leaf, that could be a problem.