Mangora

O. Pickard-Cambridge, 1889

Tuftlegged Orbweaver, Stabilimentum Orb-weaver

Mangora is a of small -weaving in the Araneidae, commonly known as tuftlegged orbweavers. These spiders are distinguished by their compact bodies, often with prominent abdominal projections or , and their distinctive vertical orb webs that frequently feature decorations called . The genus occurs across North America, Europe, and parts of Asia, with inhabiting diverse from woodlands to grasslands. Mangora spiders are active primarily in late spring and summer, with some species producing multiple per year.

Mangora placida by (c) John P Friel, some rights reserved (CC BY), uploaded by John P Friel. Used under a CC-BY license.

Mangora placida by (c) christine123, some rights reserved (CC BY), uploaded by christine123. Used under a CC-BY license.

Pronunciation

How to pronounce Mangora: //mæŋˈɡɔːrə//

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Identification

Mangora are small -weavers, with females typically measuring 4-8 millimeters in body length. They possess compact, often angular that may bear one or more pairs of or projections, giving some species a spiny or humped appearance. The legs are relatively short and stout, with dense tufts of hairs on the and —hence the 'tuftlegged orbweaver.' Coloration varies by species but often includes combinations of , , green, and black, with intricate dorsal patterns. The arrangement is typical of Araneidae, with two rows of four eyes each. Most reliably distinguished from similar small orb-weavers by the vertical orientation of their orb webs (in contrast to the horizontal webs of Leucauge) and the frequent presence of linear or cruciform of dense white at the web center.

Images

Habitat

Mangora occupy varied including deciduous and mixed woodlands, forest edges, shrublands, meadows, and riparian corridors. They are found in vegetation ranging from low herbs and grasses to shrubs and the lower branches of trees. Webs are typically constructed in relatively open sites with adequate structural support, often at heights of 0.5-2 meters above ground. Some species show preference for humid microhabitats near water sources.

Distribution

The Mangora has a broad distribution spanning the Holarctic region. In North America, occur across southern Canada, throughout the United States, and into Mexico. European records extend from Scandinavia and the British Isles south to the Mediterranean, with additional in North Africa, the Middle East (including Israel and Lebanon), and across temperate Asia. Specific distribution varies considerably by species, with some having restricted ranges while others are transcontinental.

Seasonality

Mangora are most abundant and active from late spring through summer, with peak activity typically occurring in May-July in temperate regions. Many appear to produce two annually, with adults of the second generation occurring in late summer and early autumn. may overwinter in protected situations, resuming development in early spring.

Diet

Mangora are predatory, feeding primarily on small flying captured in their webs. includes various (), small ( and ), and other minute . The vertical web orientation may influence prey composition, potentially capturing different insect than horizontal orb webs.

Life Cycle

Mangora undergo typical development with , spiderling, and stages. Females eggs in flattened, disc-shaped egg sacs constructed of , often attached to vegetation near the web. Spiderlings emerge and disperse, initially building small webs or inhabiting the maternal web briefly before establishing independent webs. Development proceeds through multiple ; in temperate regions, late-season individuals may overwinter as or , completing development the following spring. Some species are , producing two or more per year where climate permits.

Behavior

Mangora are , constructing and occupying their webs during daylight hours. A distinctive behavioral trait is the construction of —conspicuous or patterns of dense, (often UV-reflective) laid across the web, typically at the hub or in zigzag bands. The function of stabilimenta remains debated; hypotheses include attraction, deterrence through or startle effects, web reinforcement, and . When disturbed, Mangora typically drops from the web on a dragline and seeks concealment in nearby vegetation. Web maintenance includes regular repair of damaged spirals and radial threads, with complete web reconstruction occurring at intervals of several days.

Ecological Role

As small -weaving , Mangora contribute to regulation of of small flying in their . Their webs represent a distinct foraging strategy within the broader , with vertical orientation and decoration potentially partitioning resources from other web-building spiders. They serve as prey for larger , birds, and other vertebrates. The stabilimentum may have secondary ecological effects through enhanced visibility to or other flower-visiting insects.

Human Relevance

Mangora are harmless to humans and provide ecological services through pest suppression. Their small size and attractive webs with make them subjects of interest for nature observation and photography. Some , particularly Mangora acalypha, are among the most frequently encountered small -weavers in gardens and suburban in their range, contributing to backyard . They are occasionally referenced in ecological studies of web architecture evolution and stabilimentum function.

Similar Taxa

LeucaugeLeucauge ( Tetragnathidae) are similar in small size and often bright coloration, but construct horizontal webs rather than vertical ones, and lack the prominent leg tufts and abdominal characteristic of Mangora.
AraniellaAraniella ( Araneidae) are small -weavers with rounded, often greenish , but lack the angular body shape and leg tufts of Mangora; their webs are typically smaller and lack prominent .
ZygiellaZygiella ( Araneidae) construct vertical webs but are distinguished by the characteristic 'missing sector' web architecture with a signaling thread extending from the hub to a retreat, and lack the abdominal projections and dense leg tufts of Mangora.