Eureka Nature

For posting information about natural history events in and around Eureka Springs, Arkansas.

Tuesday, September 26, 2006

Ivory-billed Woodpeckers in the Florida Panhandle

More birds in Florida, better documentation etc. All the more reason to find more in Arkansas too.

Ivory-billed Woodpeckers in the Florida Panhandle

Tuesday, September 05, 2006

Sunday - Very good migrants

On Sunday at Lake Leatherwood, I had ten species of warblers, as well as multiple empids. Good birds were Yellow Warblers, and a first year female Chestnut-sided Warbler, both species highlighted in the spring. The bird of the day though was a pair of astounding brilliant Male Hooded Warblers, The plumage looked brand new, markings were crisp and textbook perfect. There was an Ovenbird with them, one of several seen that day. Many Parulas, a single Blue-wing, and two Black-and-Whites.

The lake is getting overrun with vegetation, Asian Water Milfoil, and Water Lilies. It's getting hard to see critters in there, but I did find the first migrant ducks, about ten Blue-wing Teal, none males. On an inspiration, I played some rail calls, and got a Sora to call back. It's a species I've long thought should show up there, and I thought I'd heard one sometime before, but only once and not certain. It's a new species for the park list.

Hummer aggression at feeders

I got a comment on one of my posts about aggressive hummingbirds guarding feeders and keeping other hummers from accessing the nectar. Question was if this is unusual. Answer from my experience is that it's common behavior. I have two feeders out of sight of one another. At one, I've seen six birds feeding at once, a little skittish, but able to finally get a drink. At the other there's a female that guards the feeder all day using a great deal of energy to avoid sharing. The group feeder gets refilled every three days or so, the guarded one can go two plus weeks and still not be empty. What the hummers are doing this time of year is putting on weight for migration, lots of weight, 50+% gain. So the ones with unimpeded access may be getting up to the required energy level faster than the one with control of the feeder at the cost of endless guard duty chasing off interlopers. It would be an interesting experiment to see which gains weight faster. Under conditions of very limited food supplies, guarding might be the best stategy, but unlimited access might make a looser approach better. Maybe a moral here, greed is dumb when the world is rich.