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Additional Information

Competing Interests

Luis E. Eguiarte is an Academic Editor for PeerJ.

Author Contributions

R. Carlos Almazán-Núñez conceived and designed the experiments, performed the experiments, analyzed the data, contributed reagents/materials/analysis tools, wrote the paper, prepared figures and/or tables.

Luis E. Eguiarte conceived and designed the experiments, contributed reagents/materials/analysis tools, reviewed drafts of the paper, financial support.

María del Coro Arizmendi conceived and designed the experiments, contributed reagents/materials/analysis tools, reviewed drafts of the paper, financial and logistic support.

Pablo Corcuera conceived and designed the experiments, performed the experiments, analyzed the data, contributed reagents/materials/analysis tools, wrote the paper, reviewed drafts of the paper, financial and logistic support.

Animal Ethics

The following information was supplied relating to ethical approvals (i.e., approving body and any reference numbers):

The techniques used to collect vomit and feces were non-invasive and it was no necessary to have a special authorization

Data Deposition

The following information was supplied regarding data availability:

Name of the database: Database_birds-Bursera

https://www.dropbox.com/sh/6jozpjom6yeaj2z/AAAG86JuD4BaBhU87kapm5Rxa?dl=0

Funding

This project was benefited from the financial support of projects DGAPA-PAPIIT No.IN217511 and CONABIO HQ008 IN210908 on behalf of M.C. Arizmendi. The Metropolitan Autonomous University gave financial support and the National Council of Science and Technology (CONACYT; Reg 165552) offered a scholarship to the first author. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.


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