Ants - Naturalists Handbook

I'll be honest, Hymenoptera give me the heebie jeebies, but ants surely have to be the most fascinating group of insects which have yet evolved. I'm naturally drawn to under-recorded groups and ants are very much neglected in VC55. With only 61 species occurring in Britain they are also a manageable size (compared to say, Ichneumons). But I must resist, I've made a deal with myself that I'll get to ants after I've sorted out aphids (but don't hold your breath!). When the day comes I won't be able to do better than Gary Skinner and Andrew Jarman's updated Ants book. In fact, I could splurge a lot of money on the Naturalists Handbooks Series ... but I must resist! 

Skinner, G.J. & Jarman, A.P. (2025) Ants (Naturalists Handbooks Vol. 24). Pelagic Publishing Ltd. ISBN 9781784273040 https://pelagicpublishing.com/collections/naturalists-handbooks/products/ants-second-edition

 

Ants Can't Jump

Morphological ant mimicry by Myrmarachne [ant mimic]  jumping spiders confers strong protective benefits against predators [considered to be a good example of Batesian mimicry].

BUT: 

The ant-like appearance of Myrmarachne spiders, such as narrow and constricted body with an elongated pedicel, seems unsuitable for generating the high hemolymph pressure required for jumping. 

 

Constraints on the jumping and prey-capture abilities of ant-mimicking spiders (Salticidae, Salticinae, Myrmarachne). Sci Rep 10, 18279 (2020)
https://doi.org/10.1038/s41598-020-75010-y

 

Tool use in ants

Ants not only use tools but select the best tools for the task.

Humans use tools. Chimpanzees use tools. And it turns out ants use tools too, in a surprisingly sophisticated way:

When encountering liquid food sources, ants of the genus Aphaenogaster drop various materials as tools into the food, and then carry the food-soaked tools back to the nest. Although this is one of the well-documented examples of tool use in insects, we know little about which factors influence their choice of tools during foraging. Here, we investigated the tool-using behavior of Aphaenogaster subterranea by examining, across a range of settings, how tool-using workers deal with various foraging challenges. We used different types of tools and liquid baits with varying distances between the baits and the tools piled around them. Although ants showed the strongest preference for the most easily transportable tools, the frequency of usage of the less preferred larger tools increased when these were the first to be discovered or were more readily accessible to the ants. Additionally, tool selection occurred at 2 stages: when tools were picked up and dropped into baits, and later, when food-soaked tools were retrieved from baits. Our results confirm that tool use in A. subterranea exhibits a high degree of flexibility. Ants seem to be able not only to optimize their foraging effort by selecting tools that are best matched to the particular foraging environment, but also to learn how to improve the use of certain tools by modifying them. The adaptive value of flexibility in tool use may be the increased efficiency in the utilization of liquid food sources, which gains importance in the light of competition with co-occurring ant species.

Lőrinczi et al (2018) Which tools to use? Choice optimization in the tool-using ant, Aphaenogaster subterranea. Behavioral Ecology, 29(6), 1444-1452. https://doi.org/10.1093/beheco/ary110