It is the June Beetle, commonly known as the June Bug.
The aulacocyclus edentulous is a large brown beetle that hisses and has serrated feelers. They also have the ability to fly.
The large brown beetle with long antennae typically lives in forests, fields, and gardens. Its diet consists of plant matter such as leaves, wood, and roots.
A dark brown beetle with red eyes could be the Brown Marmorated Stink Bug. They are found in New England in the United States, mostly New York.
Sounds like a pine sawyer but it depends on how large as there are many large brown leaf eaters. See photo below-
Brown algae, specifically the species Macrocystis pyrifera, is responsible for the formation of kelp beds along the North American coasts. These large brown algae can form dense underwater forests that provide habitats for various marine organisms.
It could be a cicada or a large beetle like a Brown Prionid or a Stag Beetle. Many insects have similarities in appearance, so it would be best to consult a local entomologist or use a field guide specific to Colorado insects for a more accurate identification.
North America
The large brown beetle typically lives in forests, grasslands, and gardens where there is plenty of decaying plant matter. It contributes to its ecosystem by breaking down dead plant material, which helps to recycle nutrients back into the soil. This process is important for maintaining the health of the ecosystem and supporting the growth of new plants.
It is a large aquatic beetle, in the family Coleoptera.
The Japanese Beetle are very destructive to vegetation. They eat almost any plants, making them hard for farmers and gardeners to eliminate.
The brown bear is a large bear that can be found around Eurasia and North America. The brown bear is the most omnivorous animal in the world.
no i guess