Cardinals can typically fit through openings that are about 1 to 2 inches in diameter. Their bodies are relatively compact, allowing them to navigate through small spaces in search of food or shelter. However, they prefer to stay in areas with ample foliage for cover and nesting.
The maximum size hole that a cat can fit through is typically about the size of its head, which is around 3.5 inches in diameter.
It might sound crazy but an adult rat can fit through a 1/2 inch space! I don't think a 1/2 x 1/2 hole, but definitely a horizontal space that tall. Hope this helped!
Cats can fit through holes that are about the size of their head, which is typically around 3-4 inches in diameter. The flexibility of a cat's body, including its collapsible ribcage and lack of a collarbone, allows it to squeeze through tight spaces. Other factors that determine the size of the hole a cat can fit through include the cat's size, age, and level of flexibility.
as big or bigger than the radius of a football
yes and no depends on size of hole :]
PS The previous awswer is,as far as I'm aware,100% wrong.
A.3 centimeters
8 inch sub
No, a 20 gauge wire is thicker than 1mm in diameter. It would not fit through a 1mm hole.
If the ferrets head will fit into the hole, then the rest of their body can go through the hole
No, the skull is too big.
Cats have whiskers because they help them tell how wide an opening or a hole is because their whiskers are the same size as their shoulders.It works like this:The cat finds an opening/hole and does not know whether he/she can fit through it so he/she put her whiskers through the opening/hole and if her whiskers get squished up he/she knows she cannot fit through. also, with wiskers a cat can remember its way around because they will know what hole they shoved there wiskers through and then they will be able to remember that they have gone the wrong way if they come across a hole or gap that they cannot fit through because then how can they possibly have got there?