Constricted Cormorants

One of the rarest birds in the world is the Flightless Cormorant, also known as the Galapagos Cormorant, because it is only found in the Galapagos Islands.  Like so many other species in the Galapagos, it has unique characteristics - in this case it has lost its ability to fly.  Its wings are about the third of the size needed to get this 35- to 40-inch bird off the ground.

Source:  Wikipedia

But like other cormorants it still has the webbed feet and strong legs needed to swim and dive for its dinner - mostly fish and eels.

Source:  Wikipedia

The female usually lays a clutch of three eggs, but it is not unusual for only one chick to survive.  Both the male and female take care of the chicks, but once the chicks reach a certain size if food is plentiful the female will leave 'dad' in charge and go off to find a new mate and lay more eggs.

Evolving to become flightless birds because of no real predators, since people have arrived on Galapagos bringing with them dogs and cats, the population has been as low as 400 individuals.  They are also vulnerable to getting caught in fishing nets.  The latest estimate is around 1600 birds, but there are still conservation efforts in place for this unique member of the bird family and most live within the Galapagos National Park and Marine Reserve.

Source:  Wikipedia

For a couple of videos, click here and here.