As I researched invertebrates, I found that the scientific definition of the term is any animal that doesn’t possess or develop a vertebral column. Surprisingly, however, “invertebrate” isn’t a category in phylogenetic trees, which are taxonomic classifications of all Earth’s organisms. The categories are:
Domain –> Kingdom –> Phylum –> Class –> Order –> Family –> Genus –> Species
To get to the invertebrate classification, you would look in the domain, “Eukarya.” Within that domain, there exists a kingdom called, “Animalia.” This kingdom has many phylums, none of which are named “invertebrates,” but many of them contain invertebrates. Therefore, invertebrates are any organism within the animalia kingdom without a spine. These can include not only insects, but crabs, worms, jellyfish, mollusks, starfish, spiders, and countless other organisms.
Because we don’t have scuba equipment, the majority of our studies encompass land invertebrates.
As we walked through Central Park, we found it very easy to locate invertebrates, especially insects. The ground was very damp that day, and insects were abundant. Plenty of ants crawled across the ground. Ants were the easiest invertebrate to spot. Other invertebrates scurried away quickly as we exposed them and were difficult to capture. They naturally learned to have an aversion to humans.
I usually don’t remember encountering this many insects as I walk through parks. I wonder if this is because I take them for granted and don’t pay attention to them, or maybe this has something to do with the wet environment. According to the wisdom of Google, ants and termites are easy to spot because they like to come out after rain in order to dig down in soft soil to plant their eggs. Especially termites, which like to lay eggs in underground nests and wall interiors. Many air-breathing organisms, including earthworms, come up to surface during the rain when their natural habitat gets flooded.
My next trip will be to Prospect Park, and I’m curious whether it will lead to as successful of a find as this trip did.
