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Twin-flagged Jumping Spider
Anasaitis canosus
Anasaitis canosus, previously of the genus Corythalia, is a small jumping spider that can typically be found atop leaf-litter or man-made structures such as fences and exterior walls. This species is more commonly known as the twin-flagged jumping spider due to the two pennant shaped markings on the dorsal side of the cephalothorax. Typical of the genus Anasaitis, this species has iridescent setae ("scales") which may appear white, green or pink which create the "flags" as well as patches on the male pedipalps used in courtship and intraspecific signaling. This species is roughly 5 to 6 mm in length. A. canosus ranges from Mexico to South Carolina along the Gulf of Mexico.
From the article Anasaitis canosus on Wikipedia (CC BY-SA), quoted section by section
What it does
This species exhibits an instinctive and unique hunting method for catching ants. The spider will align its abdomen and thorax so that it directly faces the ant, and then strafe in an arc until the ant is directly facing the spider. Once aligned, the spider will leap and puncture the ant on the dorsal side of the head or thorax. In this position, the dangerous mandibles are incapable of inflicting damage. When stalking prey such as flies or beetles, this salticid is much more direct in its approach and will pounce and puncture from any direction, presumably because these prey pose less risk to the spider. As is common with jumping spiders, this species uses its silk as a tether whenever leaping. In the event of a miss, they will climb up this silk line back to the previous perch.
Wikipedia: “Hunting behavior”
In human culture
The species was first described by Charles Walckenaer in Histoire naturelle des insectes (1837). It was described based on an illustration by John Abbot that appeared in his unpublished book, Drawings of the Insects of Georgia, in America (1792). There is no type specimen.
Wikipedia: “History”
Where it lives
Recorded sightings
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geo-referenced records in GBIF, from museums, herbaria and field observers.
Drag the globe to turn it. Dots are where records exist, not a range map; darker means more records.
In the stacks
Searching the stacks…
Every page naming Anasaitis canosus in the Biodiversity Heritage Library →
This page is assembled live from iNaturalist, GBIF, Wikipedia, the Source Library and the Internet Archive. It is not yet part of the hand-edited codex. iNaturalist taxon 311233.