Small ant transports big dead beetle


This 10 August 2017 video is about a small ant transporting a big dead beetle.

Ants are strong.

Carin van Dodewaard from the Netherlands made this video.

Ant-mimicking jumping spiders protect themselves


This 2012 video is called Ant mimic jumping spider – Japan Myrmarachne.

From Cornell University in the USA:

Walking like ants gives spiders a chance

July 14, 2017

Summary: To avoid being eaten, some jumping spiders pretend to be ants, a new study has found. Protective mimicry is a remarkable example of adaptive evolution: Moths can be colored like butterflies and grasshoppers may look like tiger beetles. While most mimicry studies focus on traits like color and shape, the researchers in this work used multiple high-speed cameras and behavioral experiments to pinpoint how the spider’s movements mimic ants.

Humans aren’t the only actors on the planet. To avoid being eaten, some jumping spiders pretend to be ants, according to Cornell University research published in Proceedings of the Royal Society B.

Ants are aggressive at defending themselves: They are well-armed with bites, stings and formic acid. Ant-mimicking jumping spiders — Myrmarachne formicaria — in contrast, can’t do much more than run on their eight legs when attacked. Not surprisingly, insect predators tend to prefer spiders over ants, so appearing to be an ant confers significant protection.

Protective mimicry is a remarkable example of adaptive evolution: Moths can be colored like butterflies and grasshoppers may look like tiger beetles. While most mimicry studies focus on traits like color and shape, the researchers used multiple high-speed cameras and behavioral experiments to pinpoint how the spider’s movements mimic ants.

Ant-mimicking spiders walk using all eight legs but pause frequently to raise their forelegs to mimic ant antennae. When walking, they take winding trajectories of about five to 10 body lengths, which made them look like ants following pheromone trails. While the researchers could see what the spiders were doing thanks to high-speed cameras, many potential predators have slower visual systems, so that to them the mimics appear to be moving just like an ant would.

The researchers note that the findings “highlight the importance of dynamic behaviors and observer perception in mimicry.”

Army ants video


This video says about itself:

Army Ants Rampage Through The Forest – The Hunt – BBC Earth

8 July 2017

Boasting a sensory system of 2 million antennae, this colony of Army Ants are a formidable proposition for anything alive which may cross their path. These dynamic insects, despite being blind, are able to transcend their size by working as a complete unit.

Fire ants build towers with three simple rules, by Sarah Zielinski, 2:54pm, July 21, 2017.

Ants and dead dragonfly


This 20 June 2017 video is about a dragonfly killed by a cat. After its death, the dragonfly attracted many ants.

Eight-year-old Gianni from the Netherlands made this video.

Ants transport dead caterpillar


In this 30 May 2017 video from the Netherlands, ants find a dead caterpillar. With some difficulty, they transport it to their nest.