Tuesday, October 28, 2014

Pileated Woodpecker

Pileated Woodpecker
The pileated woodpecker is the largest woodpecker in North America. That is unless you believe that the ivory billed woodpecker, which has not had a verified sighting in about 40 years, is not extinct. they are found in wooded areas of the eastern half of the United States, the Pacific Northwest and the boreal forests of Canada. They prefer an old growth forest habitat with a good number of larger trees. They are non-migratory and stay on their breeding territory all year long. They are very defensive of their territory and will often drum, pound their beaks loudly on a hollow tree, to warn other birds to stay out. They also have a loud call, that sounds like laughing or cackling, that can also be a warning to invaders. During the winter they are a little more forgiving and will let other pileated into the territory to feed.  
Pileated Woodpecker
Pileated woodpecker primarily eat ants and wood boring insect larva. They do this by excavating large holes into trees and then using their long tongue to slurp up their prey. Pileated excavations are easily identified because they are typically larger than other woodpeckers and often somewhat rectangular. Frequently song birds and smaller woodpeckers will feed inside pileated excavations. They will also eat fruit, berries and nuts. They will sometimes forage on the ground through dead leaves or on fallen trees, where there are a lot of insects. If you are lucky they may even come to a suet feeder, especially during a rough winter. 
Pileated Woodpecker
Pileated begin nesting in April. The male will make a nesting cavity, usually in a dead tree, in hopes of attracting a female. It can take weeks for him to excavate the cavity. The hole to the cavity is an oblong shape and the inside is unlined except for leftover wood chips. Pileated typically have one brood per year which consists of a clutch of 3-5 eggs. Both parents incubate the eggs which take between two to three weeks to hatch. Both parents care for the young which are born helpless and without feathers. After they raise the young the pileated woodpeckers abandon the nest. They will not use the same nest again in the future. These abandon cavities provide nesting habitat for many other types of birds including wood ducks and owls. Pileated will also sometimes nest in man made nesting boxes.



Wednesday, October 22, 2014

Olive Sparrow

Olive Sparrow
 The olive sparrow is found primarily in Mexico and Central America. The northern portion of their range does stretch into southern Texas which is the only place in the United States where they can regularly be found.
Olive Sparrow
 They are a somewhat secretive bird which are usually found in dense under growth. Their preferred habitat consists of chaparral and thornscrub thickets.They eat a combination of seeds, insects and larvae, which it gleans from the undergrowth and ground.
Olive Sparrow
 Olive sparrows do not typically migrate. Their nesting season is from march to September. They build their nest low to the ground in a shrub or cactus. The nest is usually dome shaped and made from sticks, bark, grass and leaves. They usually lay from 2 to 5 eggs per year.



Wednesday, October 8, 2014

Merlin Falcon

Female Merlin Falcon Eating a Junco
 Most people think of an old guy with a beard and a staff when they hear the name Merlin, however merlin is also the name of a species of small falcons. merlins are a circumpolar species, which means that they are found in the Northern Hemisphere in North America, Europe and Asia. In North America they breed in Alaska, Canada and the northern potions of the United States. Most migrate south for the winter into the southern and western United States, Mexico, Central and northern South America. Birds in the Pacific Northwest and along the Pacific coast of Canada and Alaska often stay on the breeding territory all year long.
Male Merlin Falcon with a Junco
 As with most raptor the male merlin is smaller than his female counterpart. However unlike most raptors there is also a difference in color between the male and female. The males have more of a blue-gray tinge to the feathers on their wings and backs where the female are brown. The photo above is a male where the other two are females. The females coloration helps to camouflage her while she is on the nest. The male does not spend much time on the nest so he is brighter which probably helps him to attract a mate.
Female Merlin Falcon Eating a Dragonfly
 Merlins are primarily bird eaters. About 80% of the merlin's diet is comprised of small song birds. The birds in the top two photos have caught dark-eyed juncos. They typically catch their prey by running them down in a high speed chase, often coming from below the prey. The other 20% of their diet is made up of small rodents and large insects. The female above captured and was eating a large darner dragonfly.