My how you've grown! Zoo takes stock of baby animals

A young Asian elephant named Assam is measured by zoo staff on May 16 during inventory day at the Hagenbeck zoo in Hamburg, Germany. Home to about 1,850 animals across 210 species, the zoo conducts a headcount of residents every year.

A young walrus opens its mouth wide as a staff member inspects its chompers.

An adorable Ouessant lamb is weighed by zoo staff as spectators and photographers look on.