Classification
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  • Scientific Names
    • Baetidae
  • English
    • Small Mayflies

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Creative Commons Flickr Photos Tagged "Baetidae."

Recent observations

Photos / Sounds

Observer

jeffcramer

Date

July 3, 2016 06:51 PM CDT

Photos / Sounds

Square

Observer

cgritz

Date

December 1, 2016 12:32 PM CST

Photos / Sounds

No photos or sounds

Observer

mbcole

Date

September 10, 2016

Photos / Sounds

No photos or sounds

Observer

mbcole

Date

September 10, 2016

Photos / Sounds

Square

Observer

mbcole

Date

October 12, 2016

Photos / Sounds

Observer

austinkaulfus

Date

November 8, 2016 01:30 PM CST

Description

I found this specimen in the river at proctor lake. The split tail was a key feature to the bicaudatis specie. The distinct appendages on either side were also key to identifying the specimen.

Citation: Bartis bicaudatis of Gunnison County, Colorado

Photos / Sounds

Square

What

Small Mayflies Family Baetidae

Observer

jerry2000

Date

November 9, 2016 02:31 PM EST

Description

Small (4 or 5 mm), dark grey/olive body, grey wings, 2 tails.

Photos / Sounds

Observer

jafuentes

Date

November 9, 2016 03:37 PM PST

Photos / Sounds

Square

What

Small Mayflies Family Baetidae

Observer

laurenhalbert

Date

November 1, 2016 01:30 PM CDT

Description

This minnow mayfly nymph (Baetidae) was found in the littoral zone of a pond in the wetlands of Proctor Lake. This organism was in water approximately six inches deep and abundant with aquatic plants, algae, and terrestrial plant debris.

Minnow mayflies, during the nymph stage, are small, streamlined larvae that possess long antennae, usually 2-3 times the length of the head's width. The head is vertically oriented. Hind wing pads are usually very small, if present at all. Oval shaped gills protrude laterally from the abdominal segments. Either two or three tails are present on minnow mayfly nymphs. When mature, they range in size from 3-12 millimeters ("Order Ephemeroptera - The Small Minnow Mayflies" Digital Key to the Aquatic Insects of North Dakota. Valley City State University, n.d. Web. 12 Nov. 2016.).

Minnow mayflies are found throughout North America and worldwide in lentic and lotic aquatic habitats. These mayflies are very sensitive to pollution, so they require clean, well-oxygenated water. Nymphs feed on dead organic matter and adult mayflies do not possess mouthparts. Minnow mayfly nymphs and adults serve as a primary food source for fish and other aquatic organisms ("Order Ephemeroptera - Mayflies." Bug Guide. Iowa State University, n.d. Web. 12 Nov. 2016.).

Photos / Sounds

Square

What

Small Mayflies Family Baetidae

Observer

bbunny

Date

November 10, 2016 06:26 PM PST

Photos / Sounds

Square

What

Red Speckled Dun Callibaetis ferrugineus

Date

August 1, 2008 01:02 PM MDT

Description

OLYMPUS DIGITAL CAMERA

Photos / Sounds

Square

What

Red Speckled Dun Callibaetis ferrugineus

Observer

psweet

Date

May 9, 2014 10:01 AM CDT

Description

SONY DSC

View all observations

Description from Wikipedia

Baetidae is a family of mayflies with about 900 described species distributed worldwide. These are among the smallest of mayflies, adults rarely exceeding 10 mm in length excluding the two long slender tails and sometimes much smaller, and members of the family are often referred to as small mayflies or small minnow mayflies. Most species have long oval forewings with very few cross veins (see Comstock-Needham system) but the hindwings are usually very small or even...

No range data available.
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