2011-08-30 Vienna XXII. district, Lobau - Danube National Park (155 msm Quadrant 7864/2).On juvenile Euphorbia sp., most likely Euphorbia cyparissias (young growth after the bushfire - click here).German name: Wolfsmilchschwrmer (Raupe)Compare for ID also www.schmetterling-raupe.de/art/euphorbiae.htm
2010-09-24 Vienna XXII. district (Lobau national park, Heisslnde - heath, 153 m AMSL).Caterpillar, on Euphorbia cyparissias; with slight damage on its last but one segment.They live off several Euphorbia species but in Central Europe mostly E. cyparissias; they prefer warm and dry regions, like Pannonian climate of eastern Austria.German name: Wolfsmilchschwrmer