Monday, December 14, 2009

Bird fo the Week December 14: Northern Mockingbird

The Northern Mockingbird is the state bird of Florida. This songbird is common through most of the United States. They are extremely versatile and can be found nesting in suburban areas as well as a wide range of other open to partly open habitats in natural areas. They forage on a variety of things including: spiders, insects, crayfish, snails, and even lizards and small snakes on occasion. They also eat berries and fruits and will often protect a source of these from other birds like American Robins. These monogamous birds build nests low down in dense brush or trees using twigs. The nests are pretty bulky and lined with finer materials. Both sexes build the nest. The female typically lays 3-4 eggs per clutch.Once incubation is done (12-13 days) the young will be fed for 10-12 days before they leave the nest. Northern Mockingbirds are very territorial and spend alot of time singing. The songs they sing can be original or mimics of other birds as well as other animals, insects, machinery, etc. The series of songs and imitative sounds are usually repeated 3-5 (or more) times.

Monday, December 7, 2009

Bird of the Week December 7: Sandhill Crane


There are two subspecies of the sandhill crane found in Florida. At Panther Island, I see Florida sandhill cranes year-round and during the winter they are often joined by migratory greater sandhill cranes. The Florida subspecies nests in late winter into spring in Florida (and on Panther Island... a goal is to photograph and document this this year!). The nests are basically flat mats of vegetaion (dead sticks, reeds, grasses, and moss) around 2 feet in diameter. Nests are found in shallow water. These birds are monogamous and it is believed they mate for life. They don't reach sexual maturity until 2 years and can live to be 20 years old. Usually the female lays 2 eggs and then both adults incubate the eggs over a period of about a month. The young are a pretty rusty or cinnamon color that fades as they age. The little ones are able to follow their parents around within a day of hatching! Sandhill cranes forage on a wide variety of things including berries, seeds, insects, snakes, frogs, crayfish and even small mammals and birds.
For additional information go to the International Crane Foundation




Monday, November 30, 2009

Bird of the Week November 30: Black Vulture


People often do not like vultures, but I happen to think they are great! They are nature's garbage disposals. Black vultures (seen in the photo) feed solely on carrion. Every morning I am greeted by a large group of black vultures that roost in trees at Panther Island. Often they are on the ground hanging out. They use thermals to soar high overhead and can be distinguished in flight from turkey vultures by the way they hold their wings. Black vultures hold their wings flatter than the "v" shape that turkey vultures make, and their tails are shorter and flatter plus more fanned out in flight. They have white patches at their wing tips but turkey vultures do not. Black vultures also flap their wings more frequently. These guys deposit eggs (usually 2) on the ground. Instead of building nests, they use existing vegetation as cover. They will also lay eggs in hollow tree trunks or caves. Both parents work to incubate the eggs for around 40 days, and the hatchlings are fed regurgitated food from both parents. Their young fledge at about 8-10 weeks. Vultures are under state protection and it is illegal to harass them or shoot them without a permit.

Monday, November 23, 2009

Bird(s) of the Week for November 23: Anhinga and Eastern Phoebe



Anhingas are often called "snake birds". These birds are year-round residents of Florida (can even be found south down to Argentina), and they are often seen perched on rocks or branches with their wings outstretched. They do this b/c they lack the oil glands other aquatic birds have and therefore need to dry their feathers. I enjoy watching them swim with their bodies completely submerged in water with their long neck and head sticking out. Sometimes I can see them spear fish with their sharp beaks. They will then break the surface and flip the meal up in the air and capture it before they finally get to eat! Anhingas feed on crayfish, shrimp, amphibians, snakes and even young alligators. They roost in trees along shorelines, and the females will construct their nests out of sticks and line it with grass and leaves. Eggs are incubated for about 30 days by both parents, and the altricial young are fed by both sexes. The males eye will become blue-green during breeding season, and the female can be distinguished by her buff-tan neck.


 Eastern phoebes are flycatchers that winter in Florida and are often seen in open woods and along woodland edges. They also like to perch on fences, utility wires, and treetops. At Panther Island, I often see them catching insects on the fly (their primary food) or feeding on berries. They build their cup-shaped nests in man-made structures now but used to use niches in natural embankments. Nests are made from mud, moss, and plant materials, and it is the female that builds them over a period of 7-10 days. these guys are very common cowbird hosts.

Sunday, November 22, 2009

Apologies!

My apologies for not getting a bird of the week up this last week. So coming soon, two birds of the week!

Monday, November 9, 2009

Recent Panther Island Sightings





 While in the field working one day, I walked by this spider clutching its prey.




 Recently I spied a beautiful purple gallinule in one of my marshes! This shot was actually taken a couple of years ago, but I wanted to share this little guy!




Great Blue Herons are one of the animals that keep me company year-round at Panther Island.

Bird of the Week for Nov. 9: Osprey


Osprey are raptors that are found year-round in Florida. These graceful birds are found near open water that contains fish (including Panther Island!). These awesome anglers are able to hover above the water while searching for prey. Once located, they swoop quickly down to grab their prey out of the water with their powerful talons. One really cool adaptive trait they have is spines on the undersides of their toes. Can you guess why that would help an osprey hunt?? It helps them hold onto slippery fish! Osprey nests are bulky stick nests located on the tops of large trees (dead or alive) and manmade structures such as utility poles. These nests are often reused year after year.
Historically, the osprey was listed as endangered back in the 1950s;  the pesticide DDT played a large role in the decline of these birds. However, in 1972 after large public outcry DDT was banned in the US. Osprey have made a successful comeback, and the osprey are not listed as an imperiled species in Florida.