Nine Spotted Ladybird Beetle: General Information and Ecology

The nine spotted ladybird beetle is a fascinating insect. It's one of the most common ladybird species in the world.

These beetles are typically between 6-8 millimeters in length and have a distinctive nine-spotted pattern on their elytra, or wing covers. They're usually black with bright orange or yellow spots.

The nine spotted ladybird beetle is a beneficial insect, known for its voracious appetite for aphids and other small insects that can harm plants. This makes them a valuable asset to gardeners and farmers.

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The nine-spotted ladybird beetle is a fascinating insect.

This beetle is native to North America, specifically the eastern and central regions.

It's a relatively small beetle, typically growing to about 6-8 millimeters in length.

Adult nine-spotted ladybird beetles have a distinctive color pattern, with nine spots on their elytra.

These beetles are primarily predators, feeding on aphids and other small insects.

In the wild, they can be found on a variety of plants, including trees, shrubs, and flowers.

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The Nine-spotted Ladybird Beetle is a small beetle that ranges between 1.7 and 7 mm in size.

They have a distinctive color pattern, with wing covers that are pale orange to red, and a dark line where the two wing covers meet.

Their spots are a key identifying feature, with nine black spots on their wing covers, although the size and number of these spots can vary.

The spots are oval-shaped and range from 4.7 to 7.0 mm in size, and the area of their elytra can range from 24.36 to 37.66 sq. mm.

Their eggs are usually orange to bright yellow in color, and retain this color if they are viable, while non-viable eggs shrivel and become dark brown or black within 2 to 3 days.

They have a broad head with a pale band between their eyes that is posteriorly and anteriorly black, and a large ventral pale spot that is trapezoidal, extending posteriorly as far as the dorsal spot.

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The nine-spotted ladybird beetle is found on a variety of agricultural lands, including alfalfa, clover, corn, cotton, potatoes, and soybeans.

It can also be found on non-agricultural vegetation in wooded habitats, grasslands, and suburban areas. A survey conducted found that it's highly likely to be living in national parks, though the reason for this is unknown.

This beetle's range is quite extensive, covering agricultural areas, suburban gardens, parks, coniferous forests, deciduous forests, prairie grasslands, meadows, riparian areas, and isolated natural areas.

The nine-spotted ladybug beetle is New York State's official insect, designated as such in 1989. It's a pretty cool designation, if you ask me.

This beetle is also known as the endangered nine-spotted ladybug, and it's one of the several dozen species of ladybug beetle found in New York state. I've heard that spotting one is a rare treat.

Six other states have adopted the ladybug as a state symbol, including Delaware, New Hampshire, Massachusetts, Tennessee, Ohio, and North Dakota.

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The Nine-spotted Lady Beetle can be found on a wide variety of areas, including agricultural land, suburban gardens, and national parks.

This beetle is highly adaptable and can thrive in many different environments.

C. novemnotata is found on various crops such as alfalfa, clover, corn, cotton, potatoes, and soybeans, as well as non-agricultural vegetation in wooded habitats and grasslands.

In Ontario, the Nine-spotted Lady Beetle was once found throughout southern Ontario and as far north as the eastern shores of Lake Superior.

Historically, Coccinella novemnotata was one of the most prevalent ladybird beetle species in its range, found throughout the Nearctic region in the United States and southern Canada.

Its range has significantly diminished in recent years, particularly in the United States, where a survey in 2009 found only a few specimens in western and central United States.

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The Nine-spotted Lady Beetle is in trouble, and it's not just a matter of bad luck. The specific cause of its decline is unknown.

Possible threats to this species include the introduction of non-native lady beetles, such as the Seven-spotted Lady Beetle and the Multi-coloured Asian Lady Beetle, which may compete with them for food and other resources.

Agricultural use of pesticides or chemicals to control the insect species they eat, like aphids, is also a concern. These chemicals can be toxic to the Nine-spotted Lady Beetle.

The loss of habitat caused by urban expansion, abandonment of farmland, and other human disturbances is another possible threat to the Nine-spotted Lady Beetle.

As recently as 35 years ago, the Nine-spotted Lady Beetle was one of the most commonly found lady beetles in agricultural fields across North America. But by 1990, it was suddenly very difficult to find.

The figure to the right above is the range map for Coccinella novemnotata, showing its former range. But, by 1990, C9 was suddenly very difficult to find.

The nearly 300 Nine-spotted Lady Beetles found by the Lost Ladybug Project so far is largely due to search teams targeting locations where C9 has been seen.

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The nine spotted ladybird beetle is a busy insect that's always on the move. It actively hunts its prey, which consists of many species of aphids.

This beetle is a mobile insect that can crawl or fly, and it's mainly active during the day. It's also worth noting that it's a diurnal insect, meaning it's awake and active during the day.

The nine spotted ladybird beetle has a unique ability to adapt to predators, displaying an aposematic coloration that warns potential predators of its toxicity.

While we don't know a lot about the social behavior of this beetle, we do know that it takes approximately 20 days for it to develop from an egg to an adult.

Coccinella novemnotata is a mobile insect that actively hunts its prey.

It crawls or flies, and is mainly active during the day. This means you're likely to see it in action during the morning and afternoon hours.

As a diurnal insect, Coccinella novemnotata is most active when the sun is shining. This is a key characteristic that sets it apart from nocturnal insects.

Coccinella novemnotata is also motile, which means it can move around easily. This is essential for its hunting and survival.

Here are some key behaviors of Coccinella novemnotata:

Interestingly, there is little known about the social behavior of Coccinella novemnotata, likely because it is so scarcely found in North America today.

C. novemnotata's lifespan is relatively short. It takes approximately 20 days for the species to develop from an egg to an adult.

Adults of the species live for several weeks during the summer. This is a brief but active period in their lives.

The final generation of the year overwinters, indicating that the species has adapted to survive through the cold winter months.

The nine-spotted ladybird beetle, Coccinella novemnotata, plays a crucial role in our ecosystem. It acts as a predator to many species of aphids, as well as spider mites, alfalfa weevils, leafhopper nymphs, and lepidopteran eggs.

Aphids are its primary prey, and it's suspected that competition over these aphids has led to the diminished population of C. novemnotata in North America. This competition is mainly with the introduced species, Coccinella septempunctata, which is also after the same prey.

The body size of C. novemnotata is particularly susceptible to prey availability, and its mean body size has decreased significantly in the past few years, indicating that it's being out-competed for prey.

Coccinella novemnotata is also considered to be a natural enemy of Ostrina nubilalis, the European corn borer. This is good news for corn farmers, as it helps to control the population of this pest.

The braconid wasp Perilitus coccinellae is known to be a parasite of C. novemnotata adults, which can impact its population.

Here are some of the species that Coccinella novemnotata preys on: