Biology

A free, expert-reviewed reference on the subjects of Earth, the natural environment, and human interactions with them. Articles are written in non-technical language accessible to to the general public.

An open-access, collaborative encyclopedia with the aim of digital access to trusted information on all known species. Hosted by the Smithsonian National Museum of Natural History.

Chemistry search engine that allows searching by CAS Registry number, chemical structure diagram, or free text.

A collection of biographies and bibliographies for notable deceased members of the National Academy of Sciences. Entries are composed by the subject's colleagues, and collectively they provide a biographical history of science in the United States.

Website dedicated to Carolus Linnaeus, 18th-century Swedish botanist who established the foundations of binomial nomenclature. The website includes an extensive bibliography and discussions of how botany was affected by Linnaeus's work.

Visual index of species of ferns and lycophytes, comprised of images posted by its user base.

The PLANTS database offers information about the various plants-- vascular and non-vascular-- within the United States and its territories. The database is operated by the Natural Resources Conservation Service of the U.S. Department of Agriculture.

IPNI provides nomenclatures (scientific names and basic bibliographical details) for vascular plants.

Run by the Biota of North America Program (BONAP), this database of vascular plants allows users to search for plants according to their family, genera, county, zip code, and more.

MaizeGDB is an informatics service funded by the U.S. Department of Agriculture dedicated to the genetics and molecular biology of Zea mays (AKA corn). The website also promotes popular papers and conferences pertaining to maize genetics.

BAMONA provides images of and information about the butterflies and moths of North America. Search by scientific or common name, or browse the taxonomy. Users can contribute to BAMONA by submitting photos of observed butterflies and moths.

Compilation of organizations around the world involved in insect research. Please note that not all organizations' websites are in the English language.

The Red List is a compilation of information on plant and animal species threatened with extinction. Species assessment is performed by the International Union for Conservation of Nature (IUCN).

This project from the Cornell Lab of Ornithology offers photo, audio, and video recordings of birds, mammals, amphibians, and more. Frequently provides multiple recordings for any given animal. Users can sign up to track their own sightings and upload media.

Maintained by the National Primate Research Center at the University of Wisconsin-Madison, PIN collects news, research, and networking information pertaining to the scientific study of non-human primates. Their website site combines the university's own research and resources with links to other institutions.

An open access journal archive providing access to international ornithological literature and documents telling the history of North American ornithology. SORA is developed and hosted by the University of New Mexico.

Database arising from an international consortium of biologists and computer scientists researching the genetics and genomics of the nematode Caenorhabditis elegans, a model organism.

Dryad is an international repository of data underlying peer-reviewed articles in the basic and applied biosciences. Dryad enables scientists to validate published findings, explore new analysis methodologies, repurpose data for research questions unanticipated by the original authors, and perform synthetic studies. Dryad is governed by a consortium of journals that collaboratively promote data archiving and ensure the sustainability of the repository.

The genetic sequence database maintained by the National Institutes of Health (NIH). Sequences are annotated, and free to download.

SRA, maintained at the NIH's National Center for Biotechnology Information, is a repository of raw, high-throughput genetic sequencing data "from all branches of life."