Answer : A Budgerigar is faster than a Cow
The average top speed of a Cow is 40 kph, (25 mph) and for a Budgerigar it is 42 kph, (26 mph)
 
| Name | Name:Cow | Name:Budgerigar | 
| Top Speed | Top Speed:40 kph, (25 mph) | Top Speed:42 kph, (26 mph) | 
|  |  | * not certain if this is top speed, but it is top documented | 
| Height | Height:170 cm, (5 ft, 6.9 in ) | Height:17 cm, (6.7 in ) | 
| Weight | Weight:650 kg, (1433 lbs) | Weight:n/a | 
| Lifespan in Wild (years) | Lifespan in Wild (years):16 | Lifespan in Wild (years):4 | 
| Description | Description:Cows are usually brown, black, and/or white, typically spotted. They eat grasses, flowers, and seeds, live in herds, and are used for milk. | Description:The budgerigar is a small bird from Australia. It is similar to a parakeet and is brightly colored in grey, green, yellow, blue, black, and white. It is believed that this is a species of parrot, and is thus the smallest parrot species, known. | 
|  |  |  | 
| Name:Cow | 
| Top Speed:40 kph, (25 mph) | 
| Height:170 cm, (5 ft, 6.9 in ) | 
| Weight:650 kg, (1433 lbs) | 
| Lifespan in Wild (years):16 | 
| Description:Cows are usually brown, black, and/or white, typically spotted. They eat grasses, flowers, and seeds, live in herds, and are used for milk. | 
|  | 
| Name:Budgerigar | 
| Top Speed:42 kph, (26 mph) | 
| * not certain if this is top speed, but it is top documented | 
| Height:17 cm, (6.7 in ) | 
| Weight:n/a | 
| Lifespan in Wild (years):4 | 
| Description:The budgerigar is a small bird from Australia. It is similar to a parakeet and is brightly colored in grey, green, yellow, blue, black, and white. It is believed that this is a species of parrot, and is thus the smallest parrot species, known. | 
|  |