11 Aug 2011: Sycamore Canyon, Santa Cruz, AZ.
- 11 August 2011
Sycamore Canyon, Santa Cruz, AZ
9:30 AM 12:30 PM; partly sunny then cloudy; 75 F
Pictures and information on location: see http://azdragonfly.net/welcome
Yesterday (11 Aug.) Richard Bailowitz and I visited Sycamore Canyon
where we found 17 odonate species (see below). Surprising to us, most
species were represented only by one to relatively few individuals.
A few weeks ago the area although not the canyon itself was
ravaged by a huge wildfire. As we walked back upstream yesterday we were
met with a massive flash flood consisting of black burn sludge and
resulting from a thunderstorm somewhere upstream in the burned area.
Thick black mud deposits along the banks of the normally clear stream
indicated that similar flood(s) took place during the past few weeks.
These unusual events probably have profound effects on the stream
ecology (larval development and survival, etc) and may account for the
uncharacteristically poor odonate numbers and diversity.
- Flame Skimmer, Libellula saturata: 10
- Plateau Dragonlet, Erythrodiplax basifusca: 2
- Giant Darner, Anax walsinghami: 1
- Wandering Glider, Pantala flavescens: 2
- Variegated Meadowhawk, Sympetrum corruptum: 4
- Serpent Ringtail, Erpetogomphus lampropeltis natrix: 1
- Lavender Dancer, Argia hinei: 3
- Spine-tipped Dancer, Argia extranea: 3
- Amethyst Dancer, Argia pallens: 2
- Sabino Dancer, Argia sabino: 1
- Springwater Dancer, Argia plana: 1
- Sooty Dancer, Argia lugens: 2
- Arroyo Bluet, Enallagma praevarum: 20
- Black-and-white Damsel, Apanisagrion lais: 1
- Painted Damsel, Hesperagrion heterodoxum: 1
- Mexican Forktail, Ischnura demorsa: 15
- Great Spreadwing, Archilestes grandis: 1
A brief afternoon visit to Arivaca Lake, Pima Co., yielded:
- Familiar Bluet, Enallagma civile: 1
- Black Saddlebag, Tramea lacerata: 2
- Mexican Amberwing, Perithemis intensa: 1
- Blue Dasher, Pachydiplax longipennis: 20
- Widow Skimmer, Libellula luctuosa: 3.
Pierre Deviche, Phoenix, AZ.
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