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Species

In biology, a species is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. Other ways of defining species include their karyotype, DNA sequence, morphology, behaviour, or ecological niche. 1

Araneus marmoreus
Marbled Orb-weaver
Archilochus colubris
Ruby-throated Hummingbird
Ardea herodias
Great Blue Heron
Argiope aurantia
Black-and-yellow Argiope
Arion subfuscus
Dusky Arion
Arisaema triphyllum
Jack-in-the-pulpit
Asarum canadense
Wild Ginger
Asclepias syriaca
Common Milkweed
Asimina triloba
Pawpaw Tree
Baliosus nervosus
Basswood Leafminer
Betula lenta
Black Birch
Betula papyrifera
Paper Birch
Bombus impatiens
Eastern Bumble Bee
Brachythecium rutabulum
Rough-stalked Feather Moss
Branta canadensis
Canada Goose
Bromus intermis
Smooth Brome Grass
Bubo virginianus
Great Horned Owl
Buteo jamaicensis
Red-Tailed Hawk
Butorides virescens
Green Heron
Calopteryx maculata
Ebony Jewelwing