After spending the past eight weeks filming the sparrow-sized Piping Plovers, it was fun to unexpectedly encounter these tubby Common Tern fledglings. Although able to fly, they stood at the water’s edge, unrelentingly demanding to be fed. The adults willingly obliged.
Unlike plovers, which can feed themselves within hours after hatching (the term is precocial), tern fledglings are semi-precocial, which means they are somewhat mobile at hatching but remain and are fed by their parents. Terns and gulls are semi-precocial.
The fledglings appear larger than the adults and are very well fed. Both parents feed their young. The terns are building fat reserves for the long migration to the South American tropical coasts, some traveling as far as Peru and Argentina.
Common Tern dive bombing gull
Although unperturbed by my presence, they sure did not like the seagulls. Any that ventured near the fledglings feeding were told in the most cheekiest of terms to buzz off–dive bombing, nipping, and nonstop loudly squawking–the intruder did not stick around for very long.
Common Tern populations are in decline, most probably because of pesticide poisoning and habitat loss.