There is lots of information about human powered flight and human powered aircraft on the internet. A brief selection:
BHPFC
This British club organises the annual Icarus Cup, an HPA competition where pilots and teams can score points by flying various tasks such as: distance, duration, figure-of-eight.
Human Powered Flight
https://www.humanpoweredflight.co.uk/
A great online resource on everything about human powered flight: The history, the aircraft, and literature.
Project Vliegfiets
The website of the first successful Dutch HPA project. It also contains some images of the other two HPAs of Jesse van Kuijk. This website is the predecessor of SHPFN.
YTV – Japan International Birdman Rally – YouTube channel
https://www.youtube.com/@ytvbirdman
The YouTube channel of the famous Japan International Birdman Rally! This competition is organized and televised by YTV, and held yearly at Lake Biwa in Japan.
Pictures of the Gossamer Condor, Gossamer Albatross, and Gossamer Penguin
Donald Monroe made beautiful photographs of the development of the Gossamer series of HPAs between 1976-1979.
Team-F
The Japanese Team-F is a team of dedicated engineers who developed their own high-performance HPA and competed in the JIBR several times. They want to break the world speed record for HPAs.
Propdesigner
propdesigner.co.uk (WayBack Machine cached paginas)
This website is no longer active, but was a treasure trove of HPA information and pictures. Parts of it can still be accessed through the WayBack machine.