Macaw Regurgitation: Normal Courtship Behavior or a Medical Problem?

Macaws can regurgitate for two very different reasons: behavior or illness. In parrots, regurgitation can be part of courtship and pair-bonding. A hormonally stimulated bird may bob the head and gently bring up food to offer to a favorite person, toy, mirror, or cage mate. This is different from vomiting, which is more forceful and often sprays material around the cage or onto the bird's head and face.

Behavioral regurgitation usually happens when the bird is otherwise bright, eating normally, and maintaining weight. It may be triggered by petting along the back or under the wings, long daylight hours, nesting-type spaces, mirrors, or intense bonding with one person. In macaws, repeated sexual frustration can make the behavior more frequent, so environment and handling matter.

Medical causes are broader and more concerning. Your vet may consider crop infection, yeast overgrowth such as candidiasis, delayed crop emptying, foreign material in the crop or stomach, dietary irritation, toxin exposure, and infectious or inflammatory disease. Merck also lists obstruction and behavioral courtship among differentials for regurgitation in pet birds, and macaws are among the species in which obstruction can occur.

A more serious cause in parrots is avian bornavirus-associated proventricular dilatation disease, sometimes called macaw wasting disease. Birds with this problem may regurgitate, pass undigested food, lose weight despite eating, or show weakness. Because the same outward sign can be normal or serious, repeated episodes deserve a conversation with your vet.

You may be able to monitor at home if your macaw has a single mild episode that clearly looks like courtship behavior. These birds are usually alert, interactive, and trying to feed a person or object. They do not look nauseated, do not fling material forcefully, and do not have food stuck over the head or cage bars.

See your vet within 24 hours if regurgitation happens more than once, starts suddenly in a bird that has never done it before, or is paired with reduced appetite, quieter behavior, weight loss, loose droppings, a full crop that is not emptying, or wet feathers around the beak. Birds often hide illness, so even subtle changes matter.

See your vet immediately if your macaw is truly vomiting, breathing hard, weak, sitting fluffed up, passing undigested food, or may have chewed metal, fabric, bedding, toxic plants, fumes, or household chemicals. Overheated nonstick cookware fumes and other airborne toxins can be life-threatening to birds. If toxin exposure is possible, call your vet or ASPCA Animal Poison Control right away.

If you are unsure whether you saw regurgitation or vomiting, it is safest to assume it could be medical. A short video of the episode, plus a gram weight trend and photos of droppings, can help your vet decide how urgent the problem is.

Your vet will start with a careful history and observation before handling your macaw. Expect questions about what the episode looked like, what your bird was interacting with, recent diet changes, chewing habits, droppings, weight trend, and any exposure to fumes, metals, new toys, or other birds. In birds, even details like food on the face, a persistently full crop, or undigested seeds in droppings can change the diagnostic plan.

A basic workup often includes a physical exam, body weight, crop palpation, and sometimes crop cytology or Gram stain to look for yeast or abnormal bacteria. Bloodwork such as a CBC and chemistry panel may be recommended to look for infection, inflammation, dehydration, or organ stress. Radiographs can help assess the crop, proventriculus, ventriculus, and possible foreign material.

If your vet suspects infectious or neurologic disease, they may discuss PCR testing for conditions such as avian bornavirus or other psittacine infections. Some birds also need fecal testing, contrast imaging, or referral to an avian-focused hospital. The goal is not only to stop the regurgitation, but to separate normal hormonal behavior from crop disease, obstruction, or systemic illness.

Treatment depends on the cause. Options may include environmental and behavior changes, diet adjustment, fluids, assisted feeding, crop-emptying support, antifungal or antimicrobial therapy when indicated, hospitalization, or surgery for obstruction. Your vet will match the plan to your macaw's stability, likely diagnosis, and your family's goals and budget.

If your macaw seems bright and your vet agrees the behavior is likely hormonal, focus on reducing pair-bonding triggers. Avoid petting the back, under the wings, or near the tail. Remove mirrors and favored objects that trigger feeding behavior. Limit access to dark, nest-like spaces, and keep a steady day-night routine with adequate sleep.

Track your bird's morning gram weight, appetite, droppings, and energy level. A kitchen gram scale used the same way each day can catch subtle decline early. If you can do so safely, record a short video of any future episode. That often helps your vet tell regurgitation from vomiting.

Do not try home medications, crop flushing, or force-feeding unless your vet has shown you exactly how. Birds can aspirate easily, and the wrong treatment can make things worse. Keep the cage warm, calm, and clean, and offer the usual balanced diet unless your vet recommends a temporary change.

If regurgitation repeats, the crop stays full, your macaw stops eating, or you notice food on the head or cage walls, stop monitoring and contact your vet. With birds, waiting too long can turn a manageable problem into an emergency.