A bird's heartbeat depends on the bird in question. A hummingbird for example can have a heartbeat of about 180 beats per minute.
birds ranges from 20 to 50 miles per hour.
Slow flying birds
It seems as though that as you look at smaller birds, their heart rate is higher than larger birds. This would lead you to believe that birds' hearts beat so fast because their small size. To keep up with it's surroundings, as well as simply to fly, the bird has to put out an immense amount of energy and oxygen. These is made up by the heart, which has to beat super fast to compensate.
Blue tits are quite slow birds; their average speed is about 25-34km/h.
Many things. Hawks, Owls, Kestrels, other birds of prey. Cats, snakes. There are many more. Anything that's a predator AND has the ability to move fast or hover in the air, will probably eat birds.
A positive chronotrope is something that increases the heatbeat.
No birds can run besides the roadrunner. However the roadrunner is very fast.
72 beats per minute
The doctor used his stethoscope to listen to the sound of your heatbeat
Is it Clare Calberth She was Dr Summerbee in Heatbeat beat
humming birds fly so fast because they are so fast
Depends on how fast the weasel is.
64km/h They are the fastest birds on land.
64km/h They are the fastest birds on land.
Running birds e.g. Ostrich can run fast comparable to horse in a desert .
Uhm, calm is not having a rapid heatbeat and being excited is having a rapid heartbeat.
Chickens are not very fast birds seeing that their top speed is only seven miles per hour.