Black-chinned Hummingbird--Desert View
21 Mar 2018, 7:06 AM,
#1
Black-chinned Hummingbird--Desert View
Arriving home from work yesterday, 20 March 2018, I was greeted by my first male Black-chinned Hummingbird of the season at Desert View on the South Rim. He continues this morning. This is a pretty typical arrival date, though the feeder has been up since the last days of February.

Brian Gatlin
Grand Canyon, AZ
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24 Mar 2018, 5:19 PM,
#2
RE: Black-chinned Hummingbird--Desert View
2 males by 21 March; joined by 2 females today, 24 March 2018.
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1 Apr 2018, 8:18 AM,
#3
RE: Black-chinned Hummingbird--Desert View
Had my FOS hummingbird today, April 1, in East Flagstaff - a male Broad-tailed Hummingbird. I think I note this every year, but the spring hummingbird phenology Brian notes at Desert View consistently differs from that of Flagstaff (earlier arrival dates, dominated by Black-chinned at Desert View), which I think is pretty interesting.

Jason
Flagstaff, AZ
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1 Apr 2018, 8:49 AM,
#4
RE: Black-chinned Hummingbird--Desert View
I have noticed with several early migrants that the earliest birds arrive in the riparian zones markedly prior to more upland habitat. FOS BCHU were reported in the Verde riparia at Clarkdale on 14 MAR but none at my upland feeders until just yesterday the 30th. LUWA appeared in the greenbelt 11 MAR but not here for a further 2 weeks. Obviously with a whopping sample of, um ...2, this is speculative and anecdotal, but they do breed in both locations. Cottonwoods leafing out seems the most obvious correlate.

FOS Broad-tailed in Clarkdale on 28MAR.
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6 Apr 2018, 5:29 PM,
#5
RE: Black-chinned Hummingbird--Desert View
Beautiful male Anna's Hummingbird showed up at my East Flagstaff feeder today, 6 April.

Jason
Flagstaff, AZ
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6 Apr 2018, 5:55 PM,
#6
RE: Black-chinned Hummingbird--Desert View
Post-breeding dispersal from the low desert? Plenty of juveniles at my feeders. Both the nests I observed at Page Spgs appeared to fledge.
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6 Apr 2018, 6:24 PM,
#7
RE: Black-chinned Hummingbird--Desert View
I think they nest up here around Elden Spring in the summer...wonder if they breed in the deserts and then move up high and try again?
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6 Apr 2018, 6:26 PM,
#8
RE: Black-chinned Hummingbird--Desert View
Jason, I've wondered the same thing about Lesser Goldfinches. We get a big pulse of them on the south rim in April, then they drop off, and pick up again around June when they breed (based on my impressions at least).
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6 Apr 2018, 7:45 PM,
#9
RE: Black-chinned Hummingbird--Desert View
There seems to be a pronounced late summer breeding effort  of Lesser Goldfinches in northern Arizona that seems to be tied to the flush of monsoon driven composites setting seed.
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6 Apr 2018, 7:59 PM,
#10
RE: Black-chinned Hummingbird--Desert View
I have observed dozens of LEGO nest attempts and can attest that on second broods, they have it dialed. They can complete a nest cycle in less than 3 weeks, including building the nest (which the ♀ can build while the ♂ is finishing off the 1st brood).
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