Female crocodiles lay eggs (about 9 to 90 eggs) and bury them in the sand.
A baby crocodile has an egg tooth on the end of its snout. It is a tough piece of skin which is totally reabsorbed less than two months after hatching. Crocodile eggs are similar to those of birds in that they have an inner membrane and an outer one. The egg tooth is used to tear open the inner membrane; the baby crocodile can then push its way through the outer shell. If conditions are particularly dry that year, the inner membrane may be too tough for the crocodile to break through, and without assistance it will simply die inside the egg. Generally, however, the mother crocodile is there to help free it.
Little crocs in some species make chirping sounds in their eggs when they are about to hatch. This tells the mother croc to dig them out of the sand nest.
99% of the crocodile offspring are eaten in the first year of life by large fish, lizards, birds, and ... adult crocodiles.
Adult crocodiles live to around 50 to 60 years; however, some have lived as long as 130 years!