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columbine sawfly
Insects diurnal

columbine sawfly

Pristiphora rufipes

Meet the tiny architect of the 'skeleton leaf.' While the columbine sawfly larvae are experts at camouflage, their voracious appetite for garden columbine makes them a fascinating subject for any backyard macro-photographer.

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Quick Identification

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Size

Adults: 5-7 mm (0.2-0.27 in); Larvae: up to 15 mm (0.6 in)

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Colors

Adults are black with distinctive yellowish-red legs; larvae are a translucent leaf-green with a pale head.

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Key Features

  • Translucent bright green larvae that blend with foliage
  • Adults have black bodies with pale reddish-yellow legs
  • Skeletonized columbine leaves with only veins remaining
  • Larvae have 6 or more pairs of prolegs (unlike caterpillars)
  • Found exclusively on Aquilegia species

When You’ll See Them

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Activity pattern diurnal
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Peak hours 10 AM - 3 PM
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Season May-July
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Diet The larvae feed exclusively on the foliage of Columbine (Aquilegia) plants, while adults may occasionally visit flowers for nectar.
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Habitat Suburban gardens, flower beds, and woodland edges where columbine plants are present.

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Behavior

The columbine sawfly is a master of disappearing in plain sight. As larvae, they match the exact shade of green found on columbine (Aquilegia) leaves, often hiding perfectly along the leaf margins where they feed. Unlike many garden pests that create random holes, these sawflies are systematic, eating from the outside edge of the leaf inward until only the thickest veins remain, a process known as skeletonizing.

As adults, they belong to the order Hymenoptera, making them closer relatives to bees and wasps than to butterflies or moths. However, they lack the typical 'wasp waist' and do not sting. They are primarily solitary, though you may find dozens of larvae on a single plant if an adult female has deposited a cluster of eggs. Their presence is usually only noticed by humans once the plant looks significantly 'thinned out' over a period of just a few days.

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Camera Tips

Because these insects are small and blend in perfectly with their host plant, capturing them on camera requires a macro-focused approach. Position your AI-powered camera within 6 to 12 inches of a columbine plant, specifically targeting the underside of the leaves or the newer, tender growth at the top. Since they are diurnal and most active during the warmth of the day, ensure your camera is positioned to avoid direct lens flare from the midday sun, which can wash out the subtle green colors of the larvae.

A time-lapse setting is the most rewarding way to document columbine sawflies. Set your camera to take a photo every 15 to 30 minutes during daylight hours. Over the course of 48 to 72 hours, you will see a fascinating transformation as the lush green foliage literally vanishes, leaving behind a skeleton of stems. This 'disappearing act' is one of the most dramatic biological processes you can capture in a suburban garden on a micro-scale.

If you are looking to capture the adult sawfly, focus your camera on the flowers and upper leaves during the early morning in late spring. Look for the distinctive 'sawing' movement of the female as she uses her ovipositor to deposit eggs into the leaf tissue. Using a high-shutter-speed setting is recommended if your camera allows, as the adults are quick flyers and can be difficult to catch in focus without it. Avoid using heavy lures; the presence of the host plant itself is the only bait you need.

Similar Species

Species that look similar or are commonly confused with columbine sawfly.

Rose Sawfly

Similar 'slug-like' larvae but found exclusively on rose bushes rather than columbine.

Cabbage White

Larvae are fuzzy and green but have fewer prolegs and feed on vegetables like kale and cabbage.

Frequently Asked Questions

Columbine sawfly larvae are most active during the warmest parts of the day, typically between 10 AM and 3 PM, when they feed most aggressively. Adults are also diurnal and are most likely to be seen hovering around host plants in the bright morning sun.
The only way to attract this species is to plant its host plant: Columbine (Aquilegia). They are specialists and will not be found on other garden flowers. Maintaining a patch of these perennials will almost certainly eventually attract local sawflies.
The larvae eat the leaves of columbine plants. They start at the edges and eat everything except the toughest central veins. Adult sawflies are less destructive and primarily feed on nectar or pollen.
Yes, they are very common in suburban gardens across North America and Europe wherever columbine is used in landscaping. Because they are so small and well-camouflaged, many gardeners have them without ever seeing the insects themselves, only the damaged leaves.
Check the legs. Columbine sawfly larvae have 6 or more pairs of 'prolegs' (the fleshy legs behind the front three pairs), while cabbage whites and other butterfly caterpillars have 5 or fewer. Additionally, sawflies will only be found on columbine, while cabbage whites prefer brassicas like kale or broccoli.

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