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The Samaan Grove Wetland System |
Wetlands Inhabitants
Waterfowl 3
by Kevin Kenny - Click images to enlarge |
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Great white egret, Casmerodius albus. This was
one of the first egrets to inhabit the estate. They are usually
solitary birds and can be seen in the rushes feeding on small
fish. Also known as the great egret, white heron, or common egret,
this is a wading bird, found in most of the tropical and warmer
temperate parts of the world. The great white egret is a large
bird with all white plumage, is as much as 101 centimetres (40
inches) long and weighs up to 950 grams (2.1 pounds). It is only
slightly smaller than the great blue or grey heron. Apart from
size, the great white egret can be distinguished from other white
egrets by its yellow bill and black legs and feet. |
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Great blue heron, Ardea herodias, is a wading bird
of the family Ardeidae, common all over North and Central
America and the Caribbean. This is the largest of the North American
herons.
This species usually breeds in colonies in trees close to lakes
or other wetlands, often with other species of herons. In Tobago
it is almost always seen alone. It builds a bulky stick nest.
The female lays three to five pale blue eggs. Both parents feed
the young at the nest by regurgitating food. So far we have not
noticed any nesting sites on the estate. |
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It feeds in the shallow water at the water's edge and spears
fish and frogs with its long, sharp bill. Its varied diet can
also include insects, snakes, rodents and small birds.
The great blue heron stands 130 centimetres (4 feet) tall,
has a 210 centimetres (5.5 foot) wingspan and weighs 2.5 kilograms
(5.5 pounds). It has a long yellow bill. Adults have blue-grey
wings and back and
a white head with a black cap and a long black plume. In flight,
the head is held close to and aligned with the body in a downward
bend in the long neck, very similar to the great white egret
shown on P-156. The long black legs trail behind. This bird flies
with strong deliberate wing beats. The call of this bird is a
harsh croak. |
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Southern lapwing, Vanellus chilensis. This is a
very common resident at Samaan Grove. These birds are normally
found in large flocks of over 10 individuals and have a very
loud call that distinguishes them from most other birds. We often
hear them flying at night which may indicate that they forage
for food in the dark. When they are not dive-bombing you, they
are a very attractive bird to look at. They have become a nuisance
at the golf course at Tobago Plantations, as many a golfer has
been seen fleeing the course as the kamikazes fly in to protect
what they think is their egg. |
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Osprey, Pandion haliaetus. One solitary osprey
has been on the estate almost from the first day the lakes filled
with water. The photograph at the right, taken in October 2004,
shows the osprey holding a fairly large tilapia in his talons
which it caught in Lake 2. They can often be seen hovering above
the lakes waiting on their chance to catch one of the abundant
fish now present. At Tobago Plantations there is a number of
pairs that fish both in the fresh water lakes and in salt water
lagoon at Petit Trou. |
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One of the largest birds of prey in Trinidad and Tobago, the
osprey eats fish almost exclusively, although on one occasion
we did see one catch a small rodent. It is also one of the most
widespread birds in the world. Size is 54-58 centimetres (21-23
inches) long with a wingspan of 150-180 centimetres (59-71 inches).
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Yellow-crowned (or black-crowned) night heron, Nyctanassa
violacea. This is a very common resident found all over
the island of Tobago. The local residents call it "Crab-e-a"
because its favourite food is the local blue crab, which it usually
hunts at night. It is also found hunting during the day. Growing
to 40 centimetres (16 inches) in length with a 1-metre (3.3-foot)
wingspan, both sexes have a blue-gray neck, chest, belly and
back feathers with dark centers. They have red eyes and long
legs varying in colour with age (black in adults). |
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