Rocca, Márcia A., Marlies Sazima, and Ivan Sazima. 2006. “Woody Woodpecker Enjoys Soft Drinks: The Blond-Crested Woodpecker Seeks Nectar and Pollinates Canopy Plants in South-Eastern Brazil”. Biota Neotropica 6 (2). Sao Paulo, Brazil. //www.biotaneotropica.org.br/BN/article/view/205.