Helping Backyard Birders since 2021!
Protect your nectar for weeks with this all-natural product that keeps hummingbird nectar fresh and prevents spoilage.
Safety Details:
Hummingbird feeders normally have to be cleaned and changed every few days. Lab and field testing have shown that the micronutrient copper in Nectar Defender will keep your nectar fresh for longer. To maintain a healthy feeder, we recommend cleaning it at least once every 2 weeks.(more if the temperatures are high)
Most people don’t realize that copper is a very common and ubiquitous element, naturally present in food, soil, and water. Copper has beneficial effects, and is something that all animals, including birds, must have for their normal growth and development. Hummingbirds naturally consume micronutrient copper in their daily diet of insects and nectar. For example, a mosquito, part of a hummingbird’s diet, has a copper content three times that of Nectar Defender. In truth, birds that do not consume an adequate level of copper encounter many serious health issues.
Long-Term Testing:
An official hummingbird nectar diet, containing a recommended level of micronutrient copper, was established by University of California Avian Scientists for the long-term maintenance of hummingbirds. The study provided protein-supplemented nectar containing 8 ppm copper (25 ppm dry basis) for 3 months to captive hummingbirds. This level of copper was selected by the researchers to satisfy the copper micronutrient requirement of hummingbirds. There were no reported signs of copper related problems or toxicities by the researcher, and the birds displayed their normal behavior of preening and singing.
(“Protein Requirements of Costa’s Hummingbirds Calypte costae”, Ann T. Brice and C. Richard Grau, Department of Avian Sciences, University of California, Davis, Physiological Zoolology 64 (2):611-626, 1991)
In another study, an official nectar diet containing 8 ppm copper (25 ppm dry basis) was created and used for the long-term maintenance of captive hummingbirds by University of California avian scientists. Anna’s and Costa’s hummingbirds were maintained on this diet for several years. On this diet and copper level, the hummingbirds thrived with no signs of problems. The birds molted normally and the males displayed singing. The birds ate the diet readily and they drank little supplementary water, from which it was concluded that the percentage of solids in the diet was not excessive. Birds were weighed routinely to confirm health, and body weights varied little over time. The researchers concluded that the hummingbirds’ acceptance of the diet and the health of the hummingbirds had provided a means to determine their requirements for nutrients. The diet has since been used by other zoos and wildlife rehabilitation organizations for the long-term maintenance other species such as Allen’s (Selasphorus sasin), black-chinned (Archilochus alexandri), and ruby throated (A. colibri) hummingbirds.
(Hummingbird Nutrition: Development of a Purified Diet for Long-Term Maintenance, A.T. Brice and C.R. Grau, Department of Avian Sciences, University of California, Davis, Zoo Biology 8:233-237 (1989))
Whole-diet hummingbird nectar products for the long term care of captive hummingbirds contains copper in the single digit ppm range as a micronutrient, so the acceptance that copper is needed near that nutrient level appears to be universal.
