Researchers at the Max Planck Institute for Ornithology discovered that hormone levels can have a significant impact on a successful breeding season in a 2011 study. To predict when a breeding pair will start laying eggs, how frequently they’ll spawn eggs and how many eggs they’ll lay over the course of the breeding season, researchers at the Max Planck Institute for Ornithology may measure the hormones prolactin and corticosterone.
The production of corticosterone increases activity and stress. Ugly Birds This inhibits reproduction. Prolactin, however, stimulates reproduction and plays a key role in the timing of the first egg. Females with higher levels of prolactin tended to lay more eggs and have more offspring.
Sleep Cycles and Hormones
Healthy sleep is an important aspect of bird wellbeing. Unbalanced sleeping patterns can lead to hormonal behavior problems in birds. See the article Hormonal Behavior in Pet Birds: Therapeutic Remedies.
To diagnose, blood tests are performed to measure glucose, insulin, or glucagon levels. To temporarily balance blood sugar, insulin is often administered by injection, mouth, or added to a bird’s drinking water. PetMD says that insulin can be added to a bird’s drinking water to allow the bird to regulate its insulin levels. 
Iodine Deficiency
Iodine deficiencies are another hormone-related condition in birds. PetMD describes it as an “enlarging of the thyroid gland from its usual size, three millimeters, to approximately one centimeter or more” and birds with this condition may also experience other symptoms such as
One can have a profound impact on the bird’s health and also influence their instinctual behavior. Hormone production is at least partially responsible for normal behaviors like breeding and sleeping. However, serious health problems can occur if a bird’s hormones are out of balance. This could be due to excessive hormone production or hormonal deficiencies.
Exotic Pets
Although captive breeding does not guarantee that the animals were raised in safe and sanitary conditions, it does not mean they are free from any health risks. Blackbirds The NHES also points out that exotic pets bred in captivity don’t necessarily mean they are “genetically identical to their wild brethren.” Their instincts remain “wild” regardless of how much time they have lived with humans.
