Sooty Dancer

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Identification

Mature males are nearly black or deep blue-black with limited pale markings; females are brown to gray with a subtler thoracic pattern.

Mature males are blackish with limited pale markings; females are brown to gray with a subtler thorax. Dusky Dancer can also look black in shade, so compare the terminal segments and the placement of remaining thoracic color.

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Documented range

Sooty Dancer ranges from Oregon and Colorado south to Chiapas, with an isolated South Dakota population.

Arizona, Colorado, New Mexico, Texas and Utah lie within the supported interior range; California and Nevada occurrence should be checked against current records rather than inferred.

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Habitat & flight period

Rocky streams and canyon rivers, often in shaded reaches with large boulders, vertical banks and patches of sun.

Most active in warm months; mountain-canyon emergence begins later than at desert foothill waters.

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Finding strategy

Search shaded rock faces and low branches where dark males disappear. A brief sun patch can reveal body pattern and eye color.

Search shaded rock faces and low branches at rocky canyon streams, then watch for a male to move through a sun patch. That natural change in illumination reveals pattern more reliably than pushing closer into the channel.

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Similar species

Dusky Dancer is another dark Argia, and several dancers appear black in shade. Compare terminal segments and thoracic pattern carefully.

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Photography in the field

Expose to retain body detail and choose an evenly toned rock or water background; harsh sun-shade boundaries are difficult to balance.

Protect the water edge, keep a working distance, and leave the insect and its perch as found.