The Chiracahua mountains of southeastern Arizona offer a multitude of scenic vistas, as well as a bounty of incredible wildlife to see.
The Chiricahua Mountains rise more than 6,000 feet above the desert floor that surrounds them, making them “islands in a sea of desert”. A variety of life zones occur along a gradient from hot, dry desert to cool pine forest at peak elevation, which means these montane islands are a hot spot of biodiversity.
Five rivers feed into the 200,000+ acres of wetlands that make up the second largest river delta system in the U.S. just north of Mobile Bay in southern Alabama. The Mobile-Tensaw delta’s expanse of swamp, bog, natural rice paddies, canals, and rivers makes this area of Alabama a real biodiversity hotspot where you can find more species of fish, turtles, snails, crayfish, and oak trees than anywhere else in North America. Harvard ecologist E.O. Wilson has called it North America’s Amazon, and so it was a real treat to venture out on a small boat to explore some of the smaller waterways of the delta for ourselves.
The southeastern U.S., and the Mobile delta in particular, was a refuge for species driven south during the ice ages of the Pleistocene glaciation. Warm temperatures year-round and plenty of rainfall (averaging 70 inches per year) ensure the most equitable conditions for life to survive, and so it has in this cradle of biodiversity.
A little Spotted Sandpiper had the entire beach of Vadnais reservoir to itself and moved slowly along the shoreline probing now and then in the mud and under leaves as I stood quietly and watched.
Spotted Sandpipers are likely the most widespread breeding sandpiper in North America, nesting from northern most Alaska to the mid-continental U.S. along rivers, lakes, and streams.
And their breeding system is particularly interesting because they exhibit a sex role reversal compared to most other bird species. Instead of the typical female role of incubation and hatchling care, Spotted Sandpiper females “collect” multiple males, laying a clutch of eggs in each male’s nest, which he will then incubate. After they hatch, the male is in charge of protecting and providing food for the chicks, while the female goes off to find another male to mate with.
Female Spotted Sandpipers arrive first on the breeding ground, establish their territory, and then compete with each other for males to mate with. Since females can store sperm from multiple matings for up to a month, the male may be incubating and tending to chicks that are not his offspring! This breeding strategy, called polyandry, is rare among birds but is found in several shorebird species, in Northern Jacanas, occasionally in Acorn Woodpeckers, and in Harris Hawks.
Prairie parkland landscapes are at their peak golden color now. The fall landscape is transforming daily, and with the nice fall weather lately, it’s a glorious time to be out walking around. I’ve given up trying to find the migrating birds at this points and am just enjoying the golden colors everywhere.
We spent a beautiful morning walking along the St. Croix river at Afton State Park recently, and I noticed that it seems more like fall weather now, and a lot less like summer. What a difference a couple of weeks makes in the climate here.
There are lots of trails to explore in the Lake Tahoe basin, and we took the grandkids on a “walk” from their cabin on Fallen Leaf lake all the way to a swimming beach on Lake Tahoe — an almost 7 mile hike. Naturally, there were a number of stops to rest and swim at places along the way, and there was a promise of ice cream at the end of the hike, and that’s all it took to get the kids there.
The winged phase of termites were swarming last week in several places we hiked. And the local insectivorous birds were cashing in on some easy meals. One particular termite feast featured more than a dozen Little Bushtits, Chestnut-backed Chickadees, a Hermit Thrush, California Towhees, and a rare Townsend’s Warbler, all flitting about catching termites in the air or just emerging from a ground nest.
But another bird was completely unperturbed by our presence, and amazingly, hopped right in front of us to grab termites off the ground.
After four days of the white stuff raining down on us, I need a shot of color from the brilliant hues of this past Fall season.
One way to ensure seed set in a plant is to capture as many pollinators as possible, and this seems to be the strategy influencing the flowering times of Goldenrod and Aster species. By blooming so late in the summer and early fall, they are pretty much the only pollen and nectar sources around.
And to ensure that bees do visit their copious numbers of flowers, the plants need to advertise themselves with the colors that are most attractive to bee eyes — yellow-green and blue-purple. Bees also key in on light that is a combination of yellow and ultra-violet, something humans can’t detect, but probably marks landing platforms or serves as nectar guides on flowers.