VOCALIZATIONS HELP DISTINGUISH MALE AND FEMALE BROWN-HEADED NUTHATCHES (Sitta pusilla) IN THE FIELD.

The article titled "Vocalizations Help Distinguish Male and Female Brown-Headed Nuthatches (Sitta pusilla) in the Field" discusses the discovery of sex-based vocalizations in the Brown-Headed Nuthatch, a cooperatively breeding species found in mature pine forests of the southeastern United States. The researchers have observed distinct vocalizations that can be used to differentiate between males and females in the field. Female nuthatches produce higher-pitched serial vocalizations with frequent peeps and multiple-syllable twitters, while male vocalizations lack these characteristics. This finding provides valuable insights into the behavior and ecology of this species and highlights the benefits of long-term field studies. [Extracted from the article]