BirdWeather is an app that shows a map with the birds that have been identified by BirdNet ID stations. It is real-time.

Red-tailed Hawk Nest is a Web cam on a hawk nest in Ithaca, NY.

Red-tailed Hawk Nest is a Web cam in San Diego, CA.

Bald Eagle Nest - Web cam in Florida.

North East Florida Bald Eagle Nest - Web cam in NE Florida.

Bald Eagle Information includes a list of Web cams on eagle nests.

Assorted Bird Cams hosted by allaboutbirds. Includes osprey, hawks, owls, condor, etc.

DC Bald Eagle Cams National Arboretum eagle cams

Channel Islands Bald Eagle Cam in Santa Cruz

Pittsburgh Bald Eagle Cams - two cams sponsored by Audubon.

Barn Owl Cam in Ramona, California.

Friends of Blackwater Osprey and Eagle Cams are in Maryland.

Audubon Bird Guide has beautiful photos of birds to help with their ID from various angles, poses, and flight. The assoicated data about habitat and range are very useful and include audio recordings. The search function is not very forgiving: a search for "red wing" did not find the "red-winged blackbird" without the dash.

Peterson OnLine has articles, forums, etc. about birds and bird watching.

All About Birds is supported by the Cornell Lab of Ornithology and includes a great photography section as well as a bird finder.

Cornell Bird Lab This is a collection of special research projects including the Project Feeder Watch, Great Backyard Bird Count, Winter Finch Survey, etc. The site also has the Clemson Universitry migration maps for specific birds.

Birding and Wild Birds is a useful collection of information from The Spruce folks, mostly for beginning and intermediate birders.

Merlin Online Bird ID Merlin is a useful bird ID app created by Cornell Labs and this site is a partial simulation of the app's capabilities.

All About Bird ID - Cornell Lab's site has good descriptions of common birds.

Beginners Guide to IDing Coopers vs Sharp-shinned Hawks

24 Ways to Tell Coopers vs Sharp-shinned Hawks

Wing-Tips is a blog with some great information. Very good description of the differences between Coopers and Sharpie hawks.

IDing Coopers vs Sharp-shinned Hawks from the folks at Feederwatch.

Distinguishing Black-capped and Carolina Chickadees - Sibley

Identifying Black-capped and Carolina Chickadees - Audubon

Black-capped and Carolina Chickadees - FeederWatch

ABA - American Birding Association - has general news and articles about the birding world. Site is not so helpful in identification. Surprisingly, their articles are presented in a way that is best displayed on a wide screen desktop.

Hawk Mountain - yes, it's THE Hawk Mountain.

Militia Hill Hawk Watch has some interesting info and data.

Cape May Bird Observatory

Cape May Times Bird Pages

Wildcat Ridge, NJ, Hawk Watch

HawkCount collects hawk counts from various locations in the USA.

HawkCount for Militia Hill

The Raptor Center This site has stills, movies, and sound clips. Pretty good.

HMANA Hawk MIgration Association of North America.

Books on Hawks has a short collection of reviews on hawk books.

West Virginia Raptor Rehab Center

Birding Hotspots has a collection of popular birding sites around the world. US sites are grouped by state.

Delaware Valley Birding Hotspots is somewhat outdated but still useful.

Liberty Bird Alliance aka Wnycote Audubon, is very local.

Cornell's Project FeederWatch for those interested in recording their bird sightings during a multi-month watch period.

eBird is a bird counting service sponsored by Audubon. You can report any sighting at any location at any time. Helps them track birds. Helps you keep a life list. Also, the site helps you identify birds.

Birdlife International has data on birds around the world. You can get estimated counts and other data collected around the world.

Birdzilla Though not as big as its name might suggest, there is material on backyard birding, shopping, photos, etc.

Birdforum.net - lots of posts to lots of birding forums (identification, photography, feeding, hummingbirds, optics/binoculars, etc.)

Which Birds Eat What Feed This site, from the FeederWatch folks, shows the feed that birds prefer along with their preferred type of feeder.

Birds and Blooms has lots of pictures and tips for feeding birds and growing flowers.

WhatBird reproduces the iPad iBird app in your browser allowing you to search for birds based on characteristics.

Winston's Bird Field Guide has plenty of descriptions of birds and their behavior.

Smithsonian 's Migratory Bird Center

Migration Forecasts Cornell Labs predictions based on eBird data reports.

Migration Interactive Maps - from the National Geographic Society

Journey North is a citizen scientist organization that tracks the migration of birds. The public report "first sightings" of various species.

Hummingbirds is a great site to learn about the hummers.

Hummingbird Central Hummingbird Central is a good source of info related to hummers including plants to attract them and feeders to feed them. The site has a geographical map that shows the first sightings of various hummers. Up-to-date map showing first sightings by date.

Spring Hummingbird Sightings has a historical map that shows the first sightings of Ruby Throated hummers. Up-to-date map showing first sightings by date.

Spring Hummingbird Sightings has a map that shows the first sightings of Ruby Throated hummers. Up-to-date map showing first sightings by date.

Hummingbird Migration Maps - shows hummingbird migration maps from previous years.

Hummingbird Migration - has info about hummer migration and shows migration maps. Current sightings are available although finding them on the site is a chore.

Bird Forum predominantly a United Kingdom site where you can read and post messages to other birders.

Nature Songs - digital recordings of some North American bird songs intended as relaxation tools.

Bird Song Links is a collection of links to sites that specialize in birdsongs.

Bird Song Hero is an interactive training site that shows you how to associate the sounds a bird makes with a visual sonograph of the sound. It's supposed to help your memory.

Bird Song Hero Demo is a Cornell Labs YouTube presentation on bird songs with sonographic visualizations.

xeno-canto is a collaborative project to record and make available recordings of bird songs from all over the world. You can submit recordings for id.

Bird Song Skill allows you to ask Alexa/Google Home to play the songs of specific birds. It uses the xeno-canto site to respond.

Song Sleuth and Sun Bird are apps that ID birds by their songs using the device microphone. These are not free apps but are reasonably cheap.

Wildbirds.com

American Birding Association - not much there.

Bird in Hand is a unusual collection of birds photographed while being held.

Information on Owls

The Owl Pages

Birdwatching Dot Com has tips, FAQ, videos, software, misters, etc.

South Carolina State Parks

Carolina Raptor Center

PBS's Life of Birds presented by David Attenborough.

Canadian Peregrine Foundation has info, photos, and webcams

The Fat Birder has a bunch of birding info - mostly in the UK.

Elk Neck State Park in Maryland, is one of Cecil Bird Club's hotspots.

Comparative Review of Birding Apps - is a comparison of the many birding apps available for mobile devices.

Birding Pal describes itself as a guide for birders who travel the world. Make social connections. The site also has birding trips all over the world where you can meet other birders who will guide you.

Birding Stuff has a lot of material especially for beginners.

Birding Buddies is a general birding site with a wide variety of information including a list of birds by state and maps with hotspots.

Sibley Guides - site of David Sibley - best bird ID book to be had.

Five Best Birding Apps according to BirdWatchingBuzz

North American Butterfly Association has pictures, questions and answers, tips on binoculars, etc.

Butterfly Website has pictures, screen savers, gardening, checklists, etc.

Butterflies and Moths has a lot of pictures that help identify these critters.

Butterfly and Moth ID allows you to restrict the display of a series of thumbnail photos to a state. The display can be further filtered by colors.

Butterfly and Moth ID has a lot of pictures that help identify these critters. This site has been the most helpful when IDing but is still very difficult to use for that purpose. If you don't know a whole lot about butterflies and moths, you have to scan through thousands of pictures since the filters that are available assume you know the species and classification language. There are no filters for size or color and the location filter cannot filter by state.

Identify Butterflies from GardensWithWings has a lot of useful filters to help with IDing.

Skippers

Butterfly ID Chart (pdf) - Rutgers document focuses on PA, NJ local varieties.

Butterflies in Pennsylvania This site has a single picture and a short description for about 40 butterfilies most frequently sighted in PA.