10,000 Birds
JULY 23, 2014
The northwestern spread of this non-native species made it to my yard a few years ago. The following maps I created on eBird show the dramatic growth in the spread of the Eurasian Collared-Dove from 2002 to 2014. This first map is data from 2002 through 2003. Like most dove species, Eurasian Collared-Doves are prolific breeders.
10,000 Birds
AUGUST 3, 2021
There was a time when I thought each bird species had its own individual song. Then I found out that there was this vocalization called a ‘call,’ so I thought each bird species had its own individual song (but just the males) and individual call. How do they know? I do wish there was more about research on female bird song.
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10,000 Birds
SEPTEMBER 17, 2011
ForestPuffin was targeting this species as it is very habitat dependent and, unbeknownst to me, such habitat exists within a big stone’s throw of my house. Second they are reliant on Horseshoe Vetch on which they lay their eggs and on which the caterpillars feed.
10,000 Birds
JULY 10, 2012
More than 150 bird species are known to have become extinct over the past 500 years, and many more are estimated to have been driven to extinction before they became known to science. The Gray Crowned-Crane is a new addition to the list of the world’s Endangered species, creeping up a category from Vulnerable.
10,000 Birds
FEBRUARY 6, 2024
Kooyman (co-author with Jim Mastro) spent decades studying Emperor Penguins and can be considered the world’s foremost expert on the species. Empire Penguins (Aptenodytes forsteri) are the largest living penguin species, almost four feet tall (taller when they stretch), and the least likely to be seen on birding or nature trips.
10,000 Birds
APRIL 27, 2012
The most common mating strategy in birds is social monogamy, found in roughly 92% of birds species in the world (Jenni 1974, Owens 2002). Social monogamy is where one male and one female pair and share the responsibilities of nest building, incubation, and chick feeding (Jenni 1974, Owens 2002). 1996, Nakamura 1998).
10,000 Birds
JANUARY 5, 2019
In reverse order, the medals were awarded for “most species seen in a country”, to Australia with 420, USA got the silver, scoring 556 while the runaway winner was Costa Rica with 646 species. Jamaica Bay, Big Egg Marsh. Jamaica Bay, Big Egg Marsh. Jamaica Bay, Big Egg Marsh. Jamaica Bay, Big Egg Marsh.
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