Morgan Arboretum - Arboretum Morgan

Insects & Spiders Print Email


The Arboretum is simply teeming with insects, and we don't just mean mosquitoes!!!

Around the world, insects represent more than half of all the known species of plants and animals on our planet. The number of different beetles alone is more than all the varieties of mammals, fish, birds, and reptiles combined!




Insects have become so abundant in form and function because they were some of the first organisms who ever ventured onto land. This, along with their small size, varied feeding habits, hard exoskeletons, wings and elaborate life cycles, allowed them to branch out and evolve into the near 1 million varieties found around the globe today. Of course, there are not that many at the Morgan Arboretum, and certainly the true number is hard to estimate, but there are still studies on going that allow us to get a better idea of the total diversity of these creatures all around us! Every corner of the Arboretum is home to one species or another, often several.

Insects occupy almost every available niche and are essential not only in the diverse food webs of the arboretum, but also are important players in nutrient release into soils, the pollination and subsequent proliferation of wild flowers and other plant species, and are of course often beautiful to photograph or admire.



Biodiversity monitoring of Butterflies and Odonates (Dragonflies and Damselflies) was conducted in 2010 and 2011. The total species identified within each group are listed below as well as some of the "highlight" species.

Butterflies: 41 species: Hackberry Emperor, Eastern Pine Elfin, Milbert's Tortoiseshell, Bronze Copper, Banded Hairstreak, Acadian Hairstreak, and Striped Hairstreak. 2011 summer highlights: Baltimore Checkerspot

Odonates (Dragonflies and Damselflies): 39 species: Stream Cruiser, Horned Clubtail, Midland Clubtail, Swamp Darner, Arrowhead Spiketail, Powdered Dancer, and Aurora Damsel. 2011 summer highlights: Spot-Winged Glider, Black Saddlebags

Please visit our nature blog by clicking on the green "Nature Blog" button just at the left-hand side of this page for more information and images to the various species observed


Spiders are a common sight here at the Arboretum, and whether we are terrified of them or fascinated by them, they always seem to amaze us. We can possibly take comfort in knowing that there are no dangerous varieties of spiders found in this area, so there is no real danger in encountering them. As a matter of fact, without these little arachnids, the summer months would simply be unbearable with the number of biting insects that would be present.


In a way, whether we love them or hate them, spiders do us a huge favor in acting as natural mosquito control, as well as providing a food source for the Arboretum's many bird species. With several hundred species found throughout the Arboretum, spiders are second only to insects in terms of diversity of species. There are web builders and hunters, big ones and small ones, but all are equally fascinating in their own way. From the tiny big-eyed jumping spiders to the masterful architects, the black and yellow argiopes, the Arboretum is an excellent home for spiders and presents a great opportunity to witness them and learn more about their curious way of life.

 For more information on these fascinating animals and the studies that are underway in this area and others please view this link -

See what the students of the St. Lawrence Ecosystems class have to say about aquatic macroinvertebrates and litter-dwelling arthropods (Macdonald Campus of McGill University, fall of 2012).

Last Updated: Tuesday, 22 January 2013 20:25