Cinnamon Tachinid vs Fierce Big-Headed Ant

Side-by-side species comparison

Attribute Cinnamon Tachinid Fierce Big-Headed Ant
Scientific Name Adejeania vexatrix Pheidole fervens
Order Diptera Hymenoptera
Family Tachinidae Formicidae
Size 12-16 mm 1.5-4 mm
Habitat Grasslands Grasslands
Diet Parasitoids Seed Feeders
Regions North America Southeast Asia, Pacific Islands, tropical Australia
Conservation Least Concern Least Concern

Cinnamon Tachinid

A large, robust tachinid fly with reddish-brown coloring and prominent bristles. It is a common parasitoid of armyworm caterpillars in western North American grasslands.

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Did You Know?

It is considered one of the most important natural enemies of armyworm outbreaks in North American rangelands.

Fierce Big-Headed Ant

A widespread tropical ant and minor invasive species with clearly dimorphic workers. Majors have disproportionately large heads used in colony defense. Colonies are aggressive and fast-growing, often dominating disturbed tropical habitats.

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Did You Know?

Despite being one of the most species-rich ant genera with over 1,000 species, Pheidole remains one of the least studied.