It all depends on what you mean by "suckling tube." An Aardvark, for example, has a long suckling tube that swallows ants. While animals such as flies have a tube called a "proboscis" in which it uses to drink.
A suckling horse is a foal that is not weaned yet.
Mammal
The long tube like body part on a male animal that it uses when mating is called a penis. The penis is part of the reproductive system in animals.
proboscis is a long sucking tube of an insect or animal
One can purchase a Cartoon Animal Tube Dispenser which squeezes out toothpaste. This is the only product one can find that is available from anything called Animal Tube. The only other thing that can be found about Animal Tube is pornography.
Afrikaans for "mammal" is "soogdier". In English that translates as "suckling animal". Mammals suckle their young.
The Suckling was created in 1990.
The duration of The Suckling is 1.48 hours.
suckling pig
Charles Suckling was born in 1920.
Suckling Airways was created in 1984.
Ernest Suckling was born in 1890.