Hepatic tanager to the song of the black-headed grosbeak, another member of the Cardinalidae. The flight call is a husky and rising "weet". It looks for food in the foliage of trees, moving slowly and methodically; different individuals use different strategies. In summer, the northern form largely eats insects, spiders and some fruit. In Mexico, it has been observed to eat nectar. From Oaxaca south, it follows swarms of army ants. Even the northern population's behavior and life history are remarkably little known. Hepatic tanager The hepatic tanager ("Piranga flava") is a medium-sized American songbird. Formerly placed in the tanager family (Thraupidae),
Spermaceti organ Spermaceti organ The spermaceti organ is an organ that commonly appears in the heads of toothed whales of the family Physeteroidea, in particular the sperm whale. This organ contains a waxy liquid called spermaceti and is involved in the generation of sound. In the modern day Great Sperm Whale ("Physeter macrocephalus"), the spermaceti organ is far larger in proportion to the animal’s body than what would be explained by simple allometry, and the evolution of the organ has caused changes in basal skull morphology, which may implicate tradeoffs were made that compromised the functionality of other nearby features. The high