Green gnats are what often refers to green lacewing bugs.
Green lacewings are often mistaken for gnats as a result of their size and flying habits which are similar to that of gnats.
Green lacewings are actually beneficial insects, especially in gardens as green lacewings prey on several types of garden pests including whiteflies, thrips and even aphids.
Green lacewings are also known by the name of aphid lions as they have predatory larvae.
Other kinds of green bugs are aphids, green lacewings, green shield bugs, June beetles, some moths and green stink bugs.
Green Stink Bugs are also known as Chinavia hilaris and is a common shield shaped bug that also has a bright green body and are known for the pungent odor that they release when they are disturbed.
Green June Beetles which are also known as continus nitida are a type of scarab beetle which a metallic green color and are known for their large size and their tendency to fly low to the ground.
Green Shield Bugs also known as Palomena Prasina are another shield shaped bug which is typically bright green in the summer and are common in gardens and other green spaces.
Green Lacewing bugs are a group of insects that have delicate and green wings and the Green Lacewing bugs larvae are also often predators of other insects which include aphids.
Green Katydids are also another type of green but and are known for their leaf like appearance and green coloration and they are often found in foliage and blend in with their surroundings.
And even six spotted green tiger beetles are also green bugs which have a metallic green body and often 6 yellowish spots on it's back.
Green bugs that are seen in homes and bedrooms are often Aphids although they can be other types of bugs as well.
Aphids are green bugs which are easily brought indoors such as on infested plants, becoming attached to your clothes, or even by the wind through an open window.
Aphids also come in a wide range of colors and not just green, but aphids can also be yellow, orange or red, beige, pink or even black in color.
Aphids love young tender growth, which can be completely covered with the insects.