Diario de plantsplantsplantsplants

Birds
Sounds: https://xeno-canto.org/ (also for other animals)
Feathers: https://www.featherbase.info/hu/home, https://www.fws.gov/lab/featheratlas/

Insects: https://bugguide.net

Ways to map observations:
Heatmap of observations: https://www.inaturalist.org/observations/map?user_id=USERNAME [replace USERNAME with your own]
Comparing different taxa [change parameters as you like]:

1. https://www.inaturalist.org/taxa/map?taxa=53794,76401,118725,51647#3/43.507/-33.926
2. https://www.inaturalist.org/observations/compare?s=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%3D%3D

List of observation fields: https://www.inaturalist.org/observation_fields

iNat tips and tricks on pfau_tarleton's profile page (scroll halfway down): https://www.inaturalist.org/people/pfau_tarleton

Bamboo: https://www.inaturalist.org/projects/identifiable-phyllostachys-of-europa/journal/94449-a-call-for-better-bamboo-observations-and-some-hints-on-how-to-do-them

Brooms: https://ipm.ucanr.edu/PMG/PESTNOTES/pn74147.html

Dipsacus (teasels): http://webidguides.com/_templates/group_teasels.html

Lupinus spp.:

1. https://tchester.org/plants/analysis/lupinus/identification.html
2. https://www.inaturalist.org/journal/leafybye/22229-the-misidentification-of-lupinus-nanus-or-lupinus-bicolor

Mustard: https://www.tchester.org/plants/analysis/mustard/comparison.html

Polypodiopsida (ferns): https://www.worldplants.de/world-ferns/ferns-and-lycophytes-list

Plants in winter: Weeds and Wildflowers in Winter by Lauren Brown
Botanical terminology: Harris & Harris’s Plant Identification Terminology: An Illustrated Glossary

Online Flora
Flora of North America: http://floranorthamerica.org
Flora of the Southeastern United States: https://fsus.ncbg.unc.edu/
List of multiple states' floras on csledge's journal post (halfway down): https://www.inaturalist.org/journal/csledge/55746-a-list-of-online-resources

Lichens
https://www.inaturalist.org/journal/rambryum/73953-resources-for-understanding-and-identifying-lichens-in-the-pacific-northwest