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"These insects are called <em>Day-flies</em> from the shortness of their existence in the perfect state; they are also called <em>May-flies</em>. Both larvae and pupae present a considerable resemblence to the perfect insect; but the entire period of the preparatory stages is passed in the water." &mdash; Goodrich, 1859

May Fly

"These insects are called Day-flies from the shortness of their existence in the perfect state;…

Adult Mayfly

Mayfly

Adult Mayfly

Head of Mayfly

Mayfly

Head of Mayfly

Prothorax of Mayfly

Mayfly

Prothorax of Mayfly

Mesothorax of Mayfly

Mayfly

Mesothorax of Mayfly

Metathorax of Mayfly

Mayfly

Metathorax of Mayfly

Abdomen of Mayfly

Mayfly

Abdomen of Mayfly

Larva of Mayfly

Mayfly

Larva of Mayfly

gill of larva of Mayfly

Mayfly

gill of larva of Mayfly

The common mayfly (Ephemera vulgata) named for its short life span.

Mayfly

The common mayfly (Ephemera vulgata) named for its short life span.