There are bird species that feed on grass or fiber.

the verdict

SUPPORTED

the evidence backs this

Recorded sources

2 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Numerous studies on avian biology and ecology document that many bird species feed on grass, seeds, and plant fiber (granivory and folivory).

The analysis

The claim is specific, empirical, and well-supported by ornithological literature showing that many bird species specialize in or include grass, seeds, and plant material in their diets, with corresponding anatomical adaptations like crops and specialized intestinal lengths.

Evidence for · 2

Diet, habitat and flight characteristics correlate with intestine length in birds.

Recorded source metadata

María J Duque-Correa, Marcus Clauss, Monika I Hoppe, Kobe Buyse, Daryl Codron, Carlo Meloro, Mark S Edwards. Diet, habitat and flight characteristics correlate with intestine length in birds.. 2022. https://doi.org/10.1098/rspb.2022.0675

Paper [9] analyzes avian intestinal morphology and explicitly includes folivory (leaf-feeding) and granivory (seed-feeding) as major dietary categories among bird species.

Source citation format

See more details

More for · 1

Fossil evidence of avian crops from the Early Cretaceous of China.

Recorded source metadata

Xiaoting Zheng, Larry D Martin, Zhonghe Zhou, David A Burnham, Fucheng Zhang, Desui Miao. Fossil evidence of avian crops from the Early Cretaceous of China.. 2011. https://doi.org/10.1073/pnas.1112694108

Paper [11] discusses the evolution of granivory and crop presence in early birds adapted to feed on seeds and plant fiber.

Source citation format

The paper trail · every fact has a biography

first checked01 Aug 2026

judged → SUPPORTED · 7501 Aug 2026

More receipts

Is it true that Phonological evolution involves regular processes of phoneme elision, vowel nasalization, and tonogenesis?Is it true that Hemangiomas are treatable with medication?Is it true that Research identifies forms of intelligence that diverge from standard IQ measures?

Random receipt →The Trust Wiki →

Anyone with this link can read the claim and its public receipt, including any personal information in that text. Open permanent receipt.

Check your own claim

Challenge the receipt

I have a source that contradicts this verdict I have a source that supports it No source: request a receipt review Requests are recorded for review. This does not start an automatic check or guarantee a response time.

trust me, bro: win the argument, pass the class, survive peer review.

Citation formatting by citeproc-js (Frank Bennett) and the Citation Style Language project. Source and licenses.

This receipt is an automated verdict against our published method · not an opinion about any author or publication.
Terms · Privacy · How verdicts work · Dispute this receipt