Phidippus regius

C. L. Koch, 1846

Regal Jumping Spider

Phidippus regius, commonly known as the regal jumping spider, is the largest of jumping spider in eastern North America. females average 15 mm in body length (range 7–22 mm), while males average 12 mm (range 6–18 mm). The species exhibits striking : males are black with white markings and iridescent green-blue-violet bearing , while females display variable brown, orange, tan, or gray scaling with green or red-violet chelicerae lacking tubercles. Research has demonstrated that P. regius possesses individual recognition capabilities based on long-term visual memory, a notable cognitive achievement for a miniature-brained, mostly solitary .

Phidippus regius by no rights reserved, uploaded by Zygy. Used under a CC0 license.

Immature male Phidippus regius 111564747 by Zygy. Used under a CC0 license.

Pronunciation

How to pronounce Phidippus regius: /ˈfɪdɪpəs ˈriːdʒiəs/

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Identification

Distinguished from other Phidippus by combination of large size, male black-and-white pattern with iridescent bearing , and female scaled coloration. From P. audax by more complex white pattern (triangle plus ovals versus single spot). From P. octopunctatus by iridescent chelicerae (non-iridescent in P. octopunctatus) and geographic range (eastern versus western North America). From P. apacheanus by color pattern (P. apacheanus males bright orange dorsally, not black and white).

Images

Habitat

Relatively open areas including fields, light woodland, trees, and building walls. Constructs silken retreat nests at night, often in palm fronds or similar shelter. Females oviposit under tree bark or within wooden structures such as barns.

Distribution

Native to southeastern United States (southern Mississippi through North and South Carolina, most abundant in Florida), The Bahamas, Bermuda, and Greater Antilles. Introduced to Easter Island.

Seasonality

active year-round in warmer parts of range; peak activity likely spring through fall. Specific seasonal patterns not well documented.

Diet

of insects and other arthropods. Prey includes lepidopteran larvae (Trichoplusia ni), dipterans (Drosophila melanogaster), and potentially . Most individuals attack and reject chemically defended milkweed bugs (Oncopeltus fasciatus), though approximately 14% of individuals kill and consume them repeatedly without apparent negative effects.

Life Cycle

Spiderlings emerge from eggsac and prioritize for approximately 3 days before shifting to predatory behavior. Predatory techniques appear pre-programmed rather than learned, though success improves with experience and maturation. Sexual maturity timing not precisely documented; may live more than one year.

Behavior

Uses vision-based individual recognition of conspecifics, demonstrated through -dishabituation paradigms showing long-term memory of specific individuals across hours. Adjusts predatory strategy based on prey type (motility, shape, size, wing presence) without prior experience. Constructs nightly silken retreats for shelter. Jumping performance uses dynamic muscle contraction rather than stored-energy catapult; trajectory angles vary with jump distance to optimize energy or time.

Ecological Role

controlling insect . Potential Batesian mimic of velvet ants (females wingless, sting-capable ) in some populations, though this hypothesis requires further verification.

Human Relevance

Minimally harmful to humans; bites may cause severe pain similar to sting with swelling lasting up to three months in sensitive individuals, likely due to individual sensitivity or localized inflammation rather than potent venom. Popular in pet trade due to large size, colorful appearance, and engaging . Subject of extensive cognitive research demonstrating advanced visual processing and memory.

Similar Taxa

Phidippus audaxBold jumping spider with similar size and black base color; distinguished by single large white spot on opisthosoma versus complex pattern in P. regius, and different geographic distribution.
Phidippus octopunctatusWestern North American of similar size; males silvery gray above with black underside, non-iridescent , and lack of .
Phidippus apacheanusMales bright orange dorsally with black underside, mimicking velvet ants; no white pattern.

More Details

Cognitive Research

P. regius has been extensively studied for its visual cognition, including individual recognition, shape discrimination learning, and amodal completion. These studies challenge assumptions that complex social cognition requires large brains or complex social structures.

Jumping Mechanics

High-speed video analysis shows P. regius uses dynamic muscle contraction for jumping, with trajectory optimization: low angles for short jumps (minimizing time), steeper angles for longer jumps (approaching energy-optimal). Hydraulic may be present but appears not energetically essential.