Got a nature riddle? Click on one of the online field guides below to find answers about the bird, plant or animal that’s puzzling you.

enature.com/fieldguides
Start here, at the most all-encompassing field guide on the web. You’ll find info on more than 5,500 plants and animals—browse by type or use the advanced search feature to input specific criteria.

bdi.org
Need an answer right away? The Biodiversity Institute’s "Field Guide to Birds" search page lets you input tons of specific characteristics about your feathered friends to better help you find a match.

arborday.org/trees/treeguide

Whether you’re trying to identify an existing tree or need help deciding what to plant, Arborday.org’s tree guide can provide you with information such as zone hardiness, growth rate, and the type of soil and amount of sunlight each tree needs to flourish.

ecokids.ca (http://www.ecokids.ca/pub/eco_info/topics/field_guide/index.cfm)
This one’s for the kids! Eco Kids’ Eco-Field Guide features fun, kid-friendly facts about a variety of plants and animals found in Canada and the U.S.