# Milkweed Longhorn Beetles (*Tetraopes*) Milkweed longhorn beetles are colorful insects that love to munch on milkweed plants. They have long antennae and are often seen in gardens and fields during summer. - **Category:** [Insects](https://www.snappit.app/explore/categories/insect) - **Rarity:** Common - **Danger:** 1/5 · Very low - **Habitat:** Fields and gardens ![Milkweed Longhorn Beetles](https://commons.wikimedia.org/w/index.php?title=Special:Redirect/file/Tetraopes_tetrophthalmus-1.jpg&width=800) Photo: CC BY 2.5 · [Wikimedia Commons](https://commons.wikimedia.org/wiki/File:Tetraopes_tetrophthalmus-1.jpg) ## Appearance The Milkweed Longhorn Beetle has a striking orange-red body adorned with distinct black spots and very long, dark antennae. Its elongated, cylindrical shape and vibrant warning colors make it visually different from many other beetles found in fields. ## Taxonomy - **Kingdom:** Animalia - **Phylum:** Arthropoda - **Class:** Insecta - **Order:** Coleoptera - **Family:** Cerambycidae - **Genus:** Tetraopes ## Interesting facts - Even though they eat poisonous milkweed, the toxins don't hurt them at all! - Sometimes you can find groups of them hanging out on a single milkweed plant! - Their "longhorns" are actually super long antennae, much longer than their whole body! - They lay their eggs at the base of milkweed plants, where larvae later feed! ## Special abilities - **Toxic Shield:** Milkweed Longhorn Beetles can absorb toxins from milkweed because of special adaptations that help them become poisonous to predators. - **Warning Colors:** Milkweed Longhorn Beetles has bright orange and black colors that help them warn predators away, signaling they are not tasty to eat. - **Root Munchers:** Milkweed Longhorn Beetle larvae can live underground for a year, using strong jaws to feed on tough milkweed roots for growth. ## Measurements & details - **Wingspan:** 20-35 mm - **Size:** 8-15 mm - **Lifespan:** 30-90 days - **Leg Count:** 6 ## Diet & Feeding These beetles munch on milkweed plants, from their roots as larvae to leaves and flowers as adults! - **Age differences:** Larvae feed exclusively on milkweed roots underground, while adults consume leaves and flowers. - **Primary Foods:** Milkweed leaves, Milkweed stems, Milkweed roots, Milkweed flowers - **Foraging Method:** Foraging ## Ecological connections - **Eats:** [Common Milkweed](https://www.snappit.app/explore/common-milkweed) (*Asclepias syriaca*) — Beetle larvae eat roots, adults eat leaves and flowers. - **Depends on:** [Monarch Butterfly](https://www.snappit.app/explore/monarch-butterfly) (*Danaus plexippus*) — Both species use milkweed for food and defense against predators. - **Eaten by:** [Blue Jay](https://www.snappit.app/explore/blue-jay) (*Cyanocitta cristata*) — Some birds learn to eat them despite their toxic defense. ## Traits - [Solitary](https://www.snappit.app/explore/traits/solitary): Solitary animals live alone for most of their lives, only interacting with others for mating or parental care. - [Colorful](https://www.snappit.app/explore/traits/colorful): Colorful describes organisms or objects displaying a wide range of bright and distinct colors. - [Grassland](https://www.snappit.app/explore/traits/grassland): Grassland habitats are terrestrial biomes dominated by grasses and herbaceous plants, supporting a variety of grazing animals. - [Herbivorous](https://www.snappit.app/explore/traits/herbivorous): This trait characterizes organisms whose diet consists entirely or primarily of plant material. - [Pollinator Magnet](https://www.snappit.app/explore/traits/pollinator-magnet): Describes plants that are particularly attractive and beneficial to a wide range of pollinating organisms. - [Diurnal](https://www.snappit.app/explore/traits/diurnal): Diurnal animals are primarily active during daylight hours, typically resting or sleeping at night. - [Urban Friendly](https://www.snappit.app/explore/traits/urban-friendly): This habitat trait indicates species that can coexist with humans in urban and suburban environments, utilizing man-made structures and green spaces. - [Pollinator](https://www.snappit.app/explore/traits/pollinator): Describes organisms that transfer pollen, enabling the fertilization and reproduction of plants. ## Collections - [Insects](https://www.snappit.app/explore/collections/insects) ## Safety **Danger:** 1/5 · Very low It's safe to look at these beetles, but don't touch them as they might be delicate. ## Frequently Asked Questions ### How to identify Milkweed Longhorn Beetles? Look for hard wing covers meeting in a line down the back, then compare the antennae, body shape, legs and markings. Metallic colors shift a lot with lighting. Beetle Identifier: upload a photo and compare the visible details. ### What is Milkweed Longhorn Beetles's wingspan? 20-35 mm ### How big is Milkweed Longhorn Beetles? 8-15 mm ### How long does Milkweed Longhorn Beetles live? 30-90 days ### What does Milkweed Longhorn Beetles eat? These beetles munch on milkweed plants, from their roots as larvae to leaves and flowers as adults! ### Where is Milkweed Longhorn Beetles usually found? Fields and gardens ### How does Milkweed Longhorn Beetles hunt? Foraging ### How many legs does Milkweed Longhorn Beetles have? 6 ## More Insects - [Common Eastern Bumble Bee](https://www.snappit.app/explore/common-eastern-bumble-bee) (*Bombus impatiens*) - [Spotted Lanternfly](https://www.snappit.app/explore/spotted-lanternfly) (*Lycorma delicatula*) - [Brown-belted Bumble Bee](https://www.snappit.app/explore/brown-belted-bumble-bee) (*Bombus griseocollis*) - [Eastern Carpenter Bee](https://www.snappit.app/explore/eastern-carpenter-bee) (*Xylocopa virginica*) --- Source: [Milkweed Longhorn Beetles: Facts & Places to See — Snappit](https://www.snappit.app/explore/milkweed-longhorn-beetles)