Tiszavirágzás - literally "the blooming of the Tisza" is actually nothing to do with flowers, or even the River Tisza. Tisza flower is the nickname for the Mayfly in HUngarian, and just about now (mid May) they are swarming in huge clouds over Hungarian rivers such as the Tisza to breed.
Lake Tisza, Hungary
Lake Tisza, wildlife wonderland
Reflections in the Tisza Lake, Hungary
"The sound of silence" - Tisza lake, Hungary
Tisza-tavi Ökocentrum / Lake Tisza Ökocentrum - Poroszlo, Heves, Hungary