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Most of the Osprey breeding in North America are migratory, only Florida, the Caribbean and Baja California host non-migratory breeders 1. In migratory populations males usually arrive to breeding grounds a few days before the females and look for nest sites.
Most Acorn Woodpeckers are cooperative breeders and live in family groups of up to a dozen or more individuals. Within a group, 1–7 male co-breeders compete for matings with 1–3 joint-nesting females who lay their eggs in the same nest cavity. This is their range map courtesy of Nature Serve.
In the mid-1970s, a local breeder was burglarized and a few of his birds escaped, after which the breeder released his remaining stock of about 50 birds 1. Like most dove species, Eurasian Collared-Doves are prolific breeders. In warm climates they can breed year round.
It didn’t occur to me till I started reading The Falcon Thief: A True Tale of Adventure, Treachery, and the Hunt for the Perfect Bird that there was also a possible threat to the eagle herself: poachers, who steal raptor eggs and chicks. McWilliam realizes he’s dealing someone special, a career falcon egg-thief.
In my imagination, the job of a male Australian Brush Turkey is pretty similar – removing or adding bits and pieces to his pile of rotting vegetation in order to get the right temperature to incubate the eggs buried underneath to hatch. It breeds in tree holes, presumably explaining the more commonly used name for it.
The breeding ecology of the Yellow-bellied Warbler was actually studied exactly here at Nonggang in 2019 by 3 Chinese researchers. Some Thai researchers looked at the breeding ecology of the Buff-breasted Babbler and published their findings in the somewhat unsuitable-sounding journal “Agriculture and Natural Resources”.
Among birds the Egyptian Vulture uses rocks to crack Ostrich eggs, the New Caledonian Crow and Woodpecker Finch (one of several Darwin Finches of the Galapagos Islands), uses sticks to extract grubs from inside a branch. This is similar to the fact that all birds, even first time breeders within a species build identical nests.
The vast majority of the 10,000+ living species of birds are passerines, and the vast majority of those have a similar system of breeding: Mom and dad bird make a nest and share parental responsibilities roughly equally, if not identically. …because cooperative breeding facilitates defense against brood parasites.
I should have known that birding High Island meant I would be 20 minutes away from a place where hundreds of thousands of shorebirds and waterbirds rest, feed, breed, and generally have a good time. I love American Avocets and I rarely see them in such marvelous breeding plumage, so I was in heaven. Clapper Rail. Back to the Flats.
Research required to determine its feeding ecology and breeding biology.” ” “Breeding Mar–Jun. The species is a cooperative breeder – birds other than the parents help feed the chicks. ” And why not. The HBW entry is basically a list of things not known about the bird: “Poorly known.
The nickel was placed in the nest for the photo to show me the size of the egg for identification purposes, then removed. The Mourning Dove is a prolific breeder. North American breeding bird survey annual summary 1989, 3 US Fish & Wildlife Service. References: 1 Birds of North America Online , 2 Droege, S.
Of course, it is hard to resist looking at a paper titled “Host personality predicts cuckoo egg rejection in Daurian redstarts” Basically, the personality of a female redstart (bold or shy) predicts the responses to parasitic eggs – bold hosts are more likely to reject parasitic eggs.
This leaves Shanghai in June with basically just the year-round species and the summer breeders, maybe with a few added ultra-lazy individuals of migratory species. Fortunately, there are a few more such breeding species than most Shanghainese are aware of. Such as the Black-winged Cuckooshrike. Such as the Black-winged Cuckooshrike.
A study on the breeding biology of Whitehead’s Broadbill was just published in May 2023 but leaves a bit of a puzzle as the breeding success is described as relatively high, meaning there should be other reasons for the population decline of the species. This is a very bad photo of a Fruithunter. Still, a bad photo.
Laight has recorded some 100 species here, including Slavonian (Horned) Grebe and Red-rumped Swallow (the first is a rare migrant/wintering species only, while the second one is an uncommon breeder). This species nests in colonies and may forage up to 6 miles away from breeding sites and the nearest mine pits are some 4-5 mi from here.
For instance, Frederick rejected centuries-old folk wisdom that claimed that Barnacle Geese ( Branta leucopsis ) – a species with a seasonal occurrence in Europe – were born not of eggs laid by breeding geese but were spontaneously incarnated from driftwood afloat at sea.
To be honest, both the robin and the flycatchers shown above remind me of the easter eggs I hunted for as a child – the same strong colors in front of a green background, same time of the year (feel free to insert your own Proust Madeleine reference here) … Bluethroats apparently are good at imitating other birds.
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