🐾 horseweed

Erigeron canadensis · wildlife atlas entry

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Erigeron canadensis (synonym Conyza canadensis ) is an annual plant native throughout most of North America and Central America. It is also widely naturalized in Eurasia and Australia. Common names include horseweed , Canadian horseweed , Canadian fleabane , coltstail , marestail , and butterweed . It was the first weed to have developed glyphosate resistance, reported in 2001 from Delaware. Text: Wikipedia, CC BY-SA.

horseweed — reference photo from iNaturalist — (c) winterling, some rights reserved (CC BY-NC), uploaded by winterling · cc-by-nc

Record card

Scientific name	Erigeron canadensis
Rank	species
Community observations	142,597 research-grade records on iNaturalist

Classification

kingdom Plantae › phylum Tracheophyta › class Magnoliopsida › order Asterales › family Asteraceae

Seen in the wild — community photographs

horseweed photograph by the iNaturalist community — 2026-10-23 · Swiftcurrent Trail, Fort Worth, TX, US
(c) Jennifer Webster, some rights reserved (CC BY-NC) · cc-by-nc

horseweed photograph by the iNaturalist community — 2026-09-14 · Буча, Київська область, Україна, 08292
(c) Alexander Baransky, some rights reserved (CC BY-NC) · cc-by-nc

horseweed photograph by the iNaturalist community — 2026-10-22 · Семилукский р-н, Воронежская обл., Россия
(c) ver_un_erizo, some rights reserved (CC BY-NC) · cc-by-nc

horseweed photograph by the iNaturalist community — 2026-10-22 · Семилукский р-н, Воронежская обл., Россия
(c) ver_un_erizo, some rights reserved (CC BY-NC) · cc-by-nc

horseweed photograph by the iNaturalist community — 2026-10-22 · Воронеж, Воронежская обл., Россия
(c) ver_un_erizo, some rights reserved (CC BY-NC) · cc-by-nc

horseweed photograph by the iNaturalist community — 2026-10-16 · Семилукский р-н, Воронежская обл., Россия
(c) ver_un_erizo, some rights reserved (CC BY-NC) · cc-by-nc

horseweed photograph by the iNaturalist community — 2026-10-23 · W 70th Ave, Vancouver, BC, CA
(c) kairune, some rights reserved (CC BY-NC) · cc-by-nc

horseweed photograph by the iNaturalist community — 2026-10-16 · Советский р-н, Воронеж, Воронежская обл., Россия
(c) ver_un_erizo, some rights reserved (CC BY-NC) · cc-by-nc

Photographs are Creative Commons-licensed observations from iNaturalist, credited as each licence requires. Click any photo for the full research record.

All horseweed records on iNaturalist → · Encyclopedia entry (Wikipedia) →

Data: iNaturalist open API · stored on this server by the wildlife build so a page request never reaches the network · observations filtered to research grade with photos.

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🦋 Monarch Butterfly

Famous for a two-to-three-generation migration across a continent each autumn — no individual makes the round trip, yet the map is inherited. Milkweed is the only nursery its caterpillars accept.

🐅 Bengal Tiger

The most numerous tiger subspecies, mostly inside India’s reserves. Fewer than 4,000 remain wild — an increase from the ~1,600 lows of the 1970s, proof that protection works when funded.

🐆 Snow Leopard

High-central-Asia ghost: fur the colour of scree, a tail nearly body-length for balance on cliffs. Counted from camera traps and scat DNA because almost nobody has ever seen one at close range.

🐼 Giant Panda

A carnivore’s gut on a bamboo diet — it must eat 10+ hours daily. Downgraded from Endangered to Vulnerable in 2016 after reserve expansion grew wild numbers by roughly 17% in a decade.

🐘 African Savanna Elephant

The largest land animal: up to 6 tonnes, ears that work as radiators, and a matriarchal memory for water across decades. A keystone engineer — whole landscapes depend on their browsing.

🦊 Red Fox

The widest-ranging land carnivore on Earth — native across the northern hemisphere and introduced (and damaging) in Australia. Hunts rodents by hearing, pouncing ear-down into snow.