Beetles is the largest order of the animal kingdom and a common site throughout the state of Tennessee, particularly in the summer months. Around 25,000 species are recognized in North America alone. They are resilient creatures, able to make a home in most any environment, from deserts to forests. They are identified by their hardened bodies either with a dull or shiny finish. They are an essential part of the natural ecosystem in that species feed on other insects, animal remains, and plants. Bodies of beetles typically showcase three separate sections - the head, pronotum, and abdomen. Over the abdomen rests wings which are covered over by the elytron, a hardened shroud. Notable beetle types include Lady Beetles (Lady Bugs), the imposing Stag Beetles, and the common black Ground Beetle.
Common Name: "Bean Leaf Beetle"
Scientific Name: Cerotoma trifurcata
TAXONOMIC BREAKDOWN: The Taxonomic Breakdown is the scientific way to categorize a partocular insect species from its largest group (Animalia) to its smallest (variable). The Genus and Species categorizations taken together make up the species' scientific name shown above, in this case Cerotoma trifurcata.
Antenna: Antenna are noticeably apparent on this insect.
Garden Pest: Known to be destructive of garden plants.
Nocturnal: Most likely to be spotted during night time hours.
Outdoors: Typically found across the great outdoors.
Pest: Generally considered a pest to humans.
Six-Legged: Six legs are common to this insect.
Small / Tiny: Noticeably small to the naked eye.
Spotted Pattern: Noted for spots or spotted pattern.
Winged: Has wings to hop or fly over distance.
The Bean Leaf Beetle has been identified by site users by the following descriptors:
small   garden   pest   yellow   black   spotted   six-legged   outdoors   wings   winged   flight   flying   antenna
The general likelihood of encountering this insect based on a given month of the year in the state of Tennessee. Generally, the best sighting months are June through August with peak occurring in July.
Below is a representation of the 'smallest-small' and 'largest-large' sizes commonly associated with the Bean Leaf Beetle. Due to monitor differences, sizes may not be exact on your particular screen. Conversions to millimeters are provided for convenience.
0.16 inches (4 mm)
0.35 inches (9 mm)
It has a typical diet of the following: garden cucumbers.
Below you will find the colors most commonly associated with the Bean Leaf Beetle. Both Primary and Secondary colors are represented in the showcase. Due to monitor differences, colors may not be exact representations.
The Bean Leaf Beetle can be found in the following Tennessee counties:
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