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March 2011
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03/20/11
Two years without stork nests at Corkscrew Swamp
Filed under: General, Birding & Outdoors, Florida & SE US, Birding "Patches"
Posted by: Ken @ 5:42 pm

A little more than an hour’s drive from our south Florida home, Corkscrew Swamp is located within the largest remaining virgin Bald Cypress forest in North America. A boardwalk provides access to six distinct habitats: pine flatwood, wet prairie, pond cypress, marsh, lettuce lakes, and bald cypress forest. Enjoy a virtual tour of the 2 1/4 mile boardwalk at this link.

Entrance sign:

Corkscrew Swamp, Collier County, Florida

Several Painted Buntings were visiting the feeders at the back porch of the Blair interpretive Center:

Painted Bunting 20110313

The large and graceful Palamedes Swallowtail is a hallmark species in southern swamps:

Black Swallowtail 20110313

The boardwalk loop begins and ends in the flatwoods, where Slash Pine, Cabbage Palms and palmetto predominate in the dry sandy soil. Several woodpecker species may be expected here. We saw three or four Pileated Woodpeckers, but none of them posed for my camera.

This Pileated Woodpecker appeared right next to the boardwalk during a prior visit to Corkscrew:

Pileated Woodpecker 3-2008_12_04

We heard the songs of many White-eyed Vireos, but only this one, in a willow at the edge of the wet prairie, provided a photo opportunity:

White-eyed Vireo20110313

Here’s a better view of the vireo’s namesake eye:

White-eyed Vireo 3-20110313

A Green Anole hunted nearby:

Green Anole 20110313

As we crossed the wet prairie, a Red-shouldered Hawk flew over the boardwalk. Note the white comma-shaped patches near its wingtips:

Red-shouldered Hawk 2-20110313

The hawk roosted in a Slash Pine. It is wearing a leg band:

Red-shouldered Hawk 20110313

Wild Blue Flag Irises bloomed in the shade of the Pond Cypress trees:

Wild Iris 20110330

Numerous Common Grackles were busy carrying nest materials. Other small birds abounded. Among them were Northern Cardinals, Northern Parulas, Palm and Pine Warblers, Downy and Red-bellied Woodpeckers, House and Carolina Wrens, Eastern Phoebes, and Blue-headed Vireos.

In the Bald Cypress forest, We saw at least a half dozen Tufted Titmice, and heard the songs and calls of many more:

Tufted Titmouse 20110313

Although the parula warblers foraged high in the canopy, several Black and White Warblers gleaned the cypress trunks:

Black and White Warbler 20110313

Great Crested Flycatchers were quite vocal, but it was difficult to catch sight of them:

Great Crested Flycatcher 2-20110313

The calls of Red-shouldered Hawks resounded through the forest. This one posed on a cypress branch at the edge of a small clearing:

Red-shouldered Hawk 3-20110313

Nearby, a volunteer naturalist pointed out a Red-shoulder’s nest containing two downy chicks:

Red-shouldered Hawk chicks 20110313

As the boardwalk skirted the lettuce lakes (actually an open-water slough, its surface coated with aquatic plants), we spotted a drowsy Yellow-crowned Night-Heron:

Yellow-crowned Night-Heron 20110313

A Great Egret’s white plumage contrasted nicely with the floating water lettuce and duckweed:

Great Egret 20110313

The egret flew up to preen in a small tree, showing off its breeding-season plumes:

Great Egret 2-20110313

Fair game for the herons, a Green Tree Frog hid in the vegetation at the Lettuce Lakes:

Tree Frog 20110313

Not far away, a Striped Mud Turtle basked in the sunlight:

Striped Mud Turtle 20110313

A second look at this off-white heron revealed a bluish bill with black tip, characteristic of a juvenile Little Blue Heron:

Little Blue Heron 20110313

Swallow-tailed Kites spend the nights in large roosts near the sanctuary. Many  wheeled overhead, but I found it impossible to capture them through the leaves of the cypress trees.

This is one of my earlier images of this graceful raptor:

Swallow-tailed Kite 20100302

Sadly, no Wood Storks were present. This should be the height of their breeding season, but they have failed to breed at Corkscrew for the second season in a row. The reasons for this failure are not entirely understood. This winter’s drought, the worst in 80 years, and near-freezing temperatures in mid-winter very likely contributed to this year’s failure. The winter of 2008-2009 was a banner year for the storks at Corkscrew. Visit this link for historic records and more information about the exacting conditions required for successful reproduction of the storks: Wood Stork Nesting Data for Corkscrew Swamp Sanctuary,  Also see Struggling Storks, which discusses their unique habitat requirements.

Over a year ago, a large number of immature Wood Storks, products of the successful 2008-2009 season, spilled over into our neighborhood, decorating this dead tree near our home:

Stork Tree 20100118

I shared the joy of the sightings with John and Barry on this delightful morning:

Birders 20110313

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