Birds hypothermia can be more deadly to birds than people because of the extreme temperature drop. Birds have an internal temperature of 104-107 degrees Fahrenheit which is much hotter than people. Once the internal body temperature drops below this range it becomes virtually impossible to survive for very long. Birds that are struggling in your yard, knowing the right techniques to spot what is going on can literally mean the difference between life or death.
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When birds are extremely cold, they puff out their feathers to try to capture and hold in some body heat. This causes them to look very round. Their appearance is different from simply puffing their feathers which they normally do when a little cold. Hypothermic birds look almost completely spherical and stay that way for long times. With the extreme puffing, birds typically take on a very distinct hunched posture with the head pulled down close to the body. This is accompanied by the tail being pointed down instead of held at the usual angle. Some birds are seen with their heads tucked under a wing or with the head pressed against their chests. They may hold this extreme position without any movement for long periods. This is especially true when it is very cold outside, and the bird is very wet. It is likely that hypothermia is setting in. The bird is trying to hold on to what little heat it has left. Unfortunately, in this defensive posture, the bird is likely to die without intervention.
Unsteady Balance And Lethargy
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Bird hypothermia causes loss of coordination and energy. Look for signs of alteration in behavior, like swaying while perched, gripping a perch unsteadily, or losing their alert posture. Hypothermic birds may sit low on a branch or feeder and appear to slouch. Their movements become slow and they lack the quick reflexes of a healthy bird. Hypothermic birds may close their eyes and look unresponsive, and will not react to nearby bird activity, and usually send birds flying out of the area. Hypothermic birds will not react when approached, and this is a major sign of distress as most birds do not approach humans. This is a state of self-induced lethargy because the bird's body is shutting down non-essential functions to preserve its core temperature to stay alive. When it is cold and you see a bird acting lethargic, do not assume the bird is being friendly, it is likely in severe danger and needs help.
Cold Feet, Legs, Or Body
Birds show early signs of temperature loss in their feet and legs. Birds have an impressive adaptive ability to make their feet warm even in winter because of one-way circulation in their feet and legs. If you see a bird's legs and feet pull blood away to protect the organs, legs look pale for instance, this happens because the bird is redirecting blood away from the extremities to conserve warmth for the body core. If you hold a bird and cool body would be an unusually high metabolic temperature for a bird Warmth would give logic from a high creature to a considerable touch to the cool body, primarily the breast area and if the breast is warm, it would indicate that the core temperature of the bird would be low and critical. Do not leave a bird of the outside cold body neglecting to warm it.
Having Weak Breathing And Quiet Vocalizing
A bird suffering from hypothermia will display unnatural breathing and may appear to be in distress. You may notice its breathing is labored and is operating at a markedly reduced rate. It's possible that some birds will even open their beaks while breathing. This is a strong indicator that the bird is not healthy and is hypothermic because healthy birds will keep their beaks shut to retain heat. Vocalizations change significantly as well. A bird that would normally call often and with a clear tone will go completely silent and if it does happen to call, the sounds will be weak and raspy. Hypothermia will slow metabolic processes down, including the energy for normal breathing which is why the calls will sound so weak. A bird that is motionless in a freezing environment is suffering greatly. When an approaching person does not elicit defensive calls and the bird is silent, it means that the the bird has completely run out of energy to respond appropriately to the perceived threat.
Hindi kumakain, umiinom, o naglalayo sa kanilang sarili
A very disturbing sign is if a bird is exhibiting no survival behavior at all. Hypothermic birds will often sit at feeders without eating or will go to watering locations without drinking. They appear to remain in hypothermia exposed areas because they do not have the energy to find shelter. They are in a very critical situation if they do not exhibit any normal instincts that would cause them to leave the ground location. Assume they are in very critical hypothermia if they do not move and allow you to pick them up or if a bird is on the ground. Once hypothermic birds are caught in time, they can recover with gentle increasing warming. Place the bird in a warm quiet indoor area in a box with ventilation. Follow this step with a move to contact a licensed wildlife rehabilitator for instructions.
