Date: 3/4/17 10:49 am From: David Ray <cardcards...> Subject: Re: Goldfinch counting
I have had regular and thistle feeders out and haven't had any goldfinches.
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> On Mar 4, 2017, at 10:33 AM, Daniel Scheiman <birddan...> wrote:
> To estimate how many birds are in an area requires standardized survey protocols such as mark-recapture or point counts so statistics can be used to extrapolate based on the sample.
> That is why for basic stationary counts submitted to eBird, whether in your yard or in a natural area, whether during the GBBC or any time of year, your tally for a species is the maximum number observed at one time in one field of view during your watch period. It is the minimum, conservative estimate – you know at least that many birds are around. For birds that are moving through in one direction, e.g. Common Grackle flocks going overhead on their way to an evening roost, you can add up each wave with little chance of double-counting.
> Dan Scheiman
> Little Rock, AR
> On 3/4/17, 9:27 AM, "The Birds of Arkansas Discussion List on behalf of Glenn" <ARBIRD-L...> on behalf of <000001214b3fcb01-dmarc-request...> wrote:
> This is the time of year where I start thinking about taking my bird feeders down. Why? Because we get so many American Goldfinches, they empty my feeders in a day. And I just can't afford to keep buying that many sunflower seeds.
> Plus, the grackles have found my feeders. Anyhow, to my question. From sunup until about 1 PM, I can usually spot 20-30 goldfinches out feeding. Do the same 30 birds stay there and feed for 6 hours straight? Or are there many more goldfinches and they just come and go? What is the best way to get an estimate on how many of these pretty yellow birds I'm actually feeding? They don't stay put, they will eat for a few minutes, then something will scare them and they all fly away, then in a couple minutes they either come back, or another group comes in. Thanks.
> Glenn Wyatt
> Sent from Yahoo Mail on Android