Here is another version of the nest, which shows how the log rises from the river a little better.
Social Flycatcher (Myiozetetes similis) Chicks in Nest, Rio Frio, Costa Rica, 2012
Little Bee-Eater (Merops pusillus), Bahir Dar, Ethiopia, June 2009
A flycatcher sits on a branch by lake Tana, patiently waiting for me to take its picture.
This was identified for me as a Little Green Bee-Eater (Merops orientalis), but I have had a chance to look at Birds of the Horn of Africa, and the distribution for the Little Green Bee Eater is wrong, and the Green one has green, not yellow, at the throat. I think it is a Little Bee-Eater, Merops pusillus.