Category: insects (Page 67 of 89)

Bug of the Week: Sap Beetles

Lately we’ve had a couple of good wind storms that have knocked the last few grapefruit off the tree.

Taking advantage of the damaged and rotting fruit are some tiny beetles.

The first thing you notice about these beetles is that they tend to shun the light.

As soon as I opened the fruit, the beetles began to run. I got a lot of photographs of the bottoms of beetles disappearing out of view.

Called sap beetles, or sometimes picnic beetles, they feed inside spoiled, rotting fruit.

There goes one now. You might also notice that its hardened top wings, called elytra, are shorter than its abdomen. Also notice the nobs on the ends of the antennae. Those are characteristic of Nitidulidae, the sap beetle family.

This fruit contained two different kinds.

Can you see the similarities between the two different types of beetles?

As scavengers, sap beetles are part of nature’s clean up crew.

Have you ever seen sap beetles in fruit you have thrown in the compost heap?

Bug of the Week: Click Beetle

You would think that with over one million species of insects on the planet, it wouldn’t be difficult to come up with a new one each week. Some weeks are easier than others. This was not one of them.:-)

I did manage to find this small click beetle, though. I can tell it is a click beetle by the shape of the thorax (the middle segment of the body). It has two spine-like projections on each side.

I could also tell it was a click beetle because it does this when it is placed on its back.

Have you ever encountered a click beetle?

Bug of the Week: Damselfly in the Desert

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2.

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For those who want to learn more:

1. This delicate insect is a damselfly. It is perched, actively hunting other small insects.

2. It was jumping off the perch, grabbing an insect and then returning to the same position. In this photograph it’s wings are down. It is watching. Look at the wings in 1 and 3. I caught a photograph just as it was landing (1) and taking off (3). The wings are elevated, ready to fly.

3. Do you notice that it is brown on brown leaves? There were other objects to perch on in the area, but most were green.I wonder if this predator takes advantage of disguises like the crab spiders from last week. What do you think?

San Diego Zoo information page

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