Hummingbird #s at Kern R. Preserve
- Hummingbird numbers continue to increase at the Kern River Preserve
feeders. Two indicators: 1. consumption of sugar water solution is up 2.
orioles are no longer being detected coming to the feeders.
The last two days have seen an all-time high in numbers of hummers at KRP
feeders since feeding began in 1999.
Thursday & Friday, August 9 & 10, 2001, 223 oz./1.7422 gals. of sugar water
solution were consumed each day. That calculates to 1307 BCHUs (Black-chinned
Hummingbird Units) per day.
The previous highs were on August 19 & 23, 2000, when 168 oz./1.3125 gals.
day of sugar water solution consumed calculated to 984 BCHUs per day.
Last year's peak took place August 23-27 when the daily BCHUs were 984, 938,
914, 938, and 914.
Only one day (August 19) before in year 2000 exceeded 900 BCHUs.
The drop-off after the peak ended August 27 was quite dramatic:
August 28 - 809 BCHUs
August 30 - 744
September 2 -627
September 4 - 539
September 9 - 428
September 16 - 275
September 23 - 141
I am very curious to see when the peak and drop-off at KRP feeders occurs this
At a private residence in the hills outside Santa Barbara 768 oz./6 gals. of
sugar water solution consumed each day this past week calculates to 4500 BCHUs
per day or 3.443 times as many hummingbirds as at KRP feeders. What a great
show! How many years has feeding taken place there?
The person outside Nogales, Arizona, who measures 2304 oz./18 gals. consumed
each day results in a calculation of 13500 BCHUs per day or 10.329 times as
many hummingbirds as at KRP feeders.
Where does all this end? Right here, right now.
Happy & Productive Birding,
Bob Barnes, Audubon-California
Friends of the Kern River Preserve
P.O. Box 833, Weldon, CA 93283
FedEx/UPS: 18747 Hwy. 178, Weldon, CA 93283
Phone: (760) 378-3044
Web Site: http://www.kernriverpreserve.org