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What kind of insect it this?

创建于：2025年6月18日

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问题

微信图片_2025-06-18_080939_253.jpg微信图片_2025-06-18_080939_253.jpg

What kind of insect it this?

Python

python
from PIL import Image
import matplotlib.pyplot as plt

img = Image.open('/mnt/data/微信图片_2025-06-18_080939_253.jpg')
plt.imshow(img)
plt.axis('off')

(-0.5, 1278.5, 1705.5, -0.5)

Python

python
plt.figure(figsize=(4,4))
# crop approximate center area
w, h = img.size
crop = img.crop((w*0.3, h*0.35, w*0.7, h*0.6))
plt.imshow(crop)
plt.axis('off')

(-0.5, 510.5, 426.5, -0.5)

Python

python
plt.figure(figsize=(4,4))
crop2 = img.crop((w*0.35, h*0.4, w*0.6, h*0.55))
plt.imshow(crop2)
plt.axis('off')

(-0.5, 318.5, 255.5, -0.5)

思考

The user has provided an image for insect identification. Based on the description, I think it's likely an Asian longhorn beetle (Anoplophora glabripennis), recognizable by its black body with 10-12 white spots and long antennae with alternating black and white bands. There’s also a possibility it could be the citrus longhorn beetle (Anoplophora chinensis), which looks quite similar. I need to closely inspect the image to confirm these features and make a definitive identification. Let’s take a closer look!

Thought for 34 seconds

回答

That looks like a long-horned beetle (family Cerambycidae), most likely the Asian long-horned beetle Anoplophora glabripennis. Key features visible in your photo:

Field markWhat you can see
Glossy black body with irregular white dotsThe elytra (wing-covers) are sprinkled with many white, roughly round spots.
Very long antennae, banded black-and-whiteEach antenna is longer than the beetle’s body and has alternating pale and dark segments.
Robust size & shapeAdults are usually 2–3 cm long and fairly chunky, matching the proportions in the image.

Why it matters

The Asian long-horned beetle is a wood-boring species whose larvae tunnel deep into hardwood trees (maple, poplar, willow, citrus, etc.). In its native East Asia it’s just part of the ecosystem, but when transported to other regions it can be a serious invasive pest, killing trees and prompting eradication campaigns. If you spotted this outside its native range, local agriculture or forestry agencies usually want to know.

What to do

  • Indoors – simply relocate it outside; it won’t bite or sting.
  • Outdoors, in its normal range (much of East Asia) – nothing special; it’s native.
  • Outdoors, outside its native range (e.g., Europe or North America) – photograph it clearly, note the location, and report it to your local plant-health or forestry authority so they can check nearby trees.

Let me know where you found it if you’d like more specific advice on reporting or on keeping your trees safe!

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