Common Cat's-ear
Hypochaeris radicata
A master of disguise often mistaken for a dandelion, the Common Cat's-ear is a rugged perennial that provides a vital summer feast for backyard pollinators.
Quick Identification
Size
Height: 15–60 cm (6–24 in); Leaf rosette diameter: 10–25 cm (4–10 in)
Colors
Bright yellow flower heads; deep green leaves often with a bluish-grey tint; wiry green to purple-tinged stems
Key Features
- Basal rosette of hairy, lobed leaves
- Solid, wiry, and branched flower stems
- Yellow flower heads with multiple layers of green bracts
- Deep, thick taproot that exudes milky sap when cut
When You’ll See Them
Geographic range
Where Does the Common Cat's-ear Live?
Originally native to Europe and North Africa, the Common Cat's-ear has become one of the most successful globetrotting plants in the world. It is now widely naturalized across North America—where it is particularly prevalent in the Pacific Northwest—as well as across South America, Japan, Australia, and New Zealand. This hardy pioneer thrives in almost any temperate climate, following human development and agricultural expansion into nearly every corner of the globe.
Basemap © OpenStreetMap contributors
Behavior
Common Cat's-ear is a resilient perennial herb that has mastered the art of survival in disturbed environments. Unlike the common dandelion, which it closely resembles, Cat's-ear is a "flatweed," meaning its leaves grow in a tight, ground-hugging rosette that can survive the blades of a lawnmower. It is a heliotropic species, with its bright yellow flowers opening in the morning sun and closing as the light fades or during overcast weather.
This plant plays a vital role in the backyard ecosystem as a primary nectar source for a wide variety of generalist pollinators. Because it blooms later and longer into the summer than many other spring ephemerals, it often becomes a hub for solitary bees, hoverflies, and small butterflies. While gardeners may view it as a persistent weed, its ability to thrive in poor, compacted soil helps prevent erosion and provides food for micro-fauna.
EverydayEarth exclusive
Camera Tips
To successfully capture Common Cat's-ear on a backyard camera, placement is everything. Position your camera on a low tripod or ground mount, ideally only 5 to 10 inches above the soil. This low angle allows the AI to clearly see the 'hairy' texture of the leaves—the defining feature that gives the plant its name—and the way the stems branch, which distinguishes it from the single-stemmed dandelion. Aim for a specimen that is slightly isolated from thick grass to ensure the camera's focus remains sharp on the yellow flower heads.
Because plants are stationary, the most exciting footage comes from the pollinators they attract. Set your AI camera to a high-sensitivity motion trigger or, better yet, use a Time-Lapse mode during the peak daylight hours of 10:00 AM to 2:00 PM. This is when the flowers are fully open and the UV-reflective petals are most attractive to bees and hoverflies. If your camera has a macro setting or a close-focus lens, use it to capture the intricate details of the florets and the insects visiting them.
Be mindful of the wind, which is the biggest challenge when filming Common Cat's-ear. The tall, wiry stems are designed to sway, which can lead to hundreds of 'false' triggers on standard motion-sensing cameras. To prevent this, you can use a small garden stake to subtly tether the main stem out of the camera's direct line of motion, or adjust your camera's detection zone to focus primarily on the static basal rosette at the ground level while leaving the swaying flowers for the time-lapse captures.
Similar Species
Species that look similar or are commonly confused with Common Cat's-ear.
Frequently Asked Questions
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