We know of no organised tours to Guinea-Bissau.
We do not know of any guides in Guinea-Bissau.
There are two ornithological trip reports in the journal Malimbus, from 1992 and 1986: RODWELL, S.P. (1996) and HAZEVOET, C.J. (1996).
There are infrequent flights from Europe to Bissau and internal flights which include the outlying islands. There are regular flights to Bissau from Dakar, Senegal. Public transport consists of mini buses and bush taxis on most main routes and pick ups on the lesser used routes. Most towns are accessible by ship or riverboat and ferries are available from Bissau to Bolama, Bubaque Island, Bafatá, Catio and Enxudé. Road conditions are relatively good but during the wet season unsealed roads can become impassable. Car Hire is very limited and expensive and generally only available in Bissau.
Safety and health issues are no different from those in many African countries. Guidebooks, travel companies and websites provide much of the advice one needs, but key points warrant repetition here: (1) be aware of the risk of malaria and seek current advice, sleep in a sealed tent or under a net and take prophylaxis as recommended; (2) always ensure you have sufficient water and some method of purification (even if this comprises a pot and a campfire for boiling); (3) do not underestimate the danger of being in the sun for too long, ensure you use sun-block, drink plenty of water and wear a hat; (4) be aware of the risk of AIDS; (5) ensure that you take a reasonably-equipped first-aid pack with you including supplies of hypodermic and suturing needles. See the following 2 websites or your own local embassy for the latest safety and travel information: US Travel and UK FCO.