Welcome to DU!
The truly grassroots left-of-center political community where regular people, not algorithms, drive the discussions and set the standards.
Join the community:
Create a free account
Support DU (and get rid of ads!):
Become a Star Member
Latest Breaking News
General Discussion
The DU Lounge
All Forums
Issue Forums
Culture Forums
Alliance Forums
Region Forums
Support Forums
Help & Search
Birders
Related: About this forumAudubon: Where Do Hummingbirds Get All That Energy?
X post from GD
We had our first Ruby-throated Hummingbird sighting Tuesday. A lone female. We saw a male and female Wednesday.
http://www.audubon.org/news/where-do-hummingbirds-get-all-energy?utm_source=HaH-engagement&utm_medium=email&utm_campaign=2016-05-02-Energy
By Noah Strycker April 13, 2016
Unique among avians, hummingbirds can be thought of as natures little hoverboardsexcept, of course, they don't explode into flames. Their fighter-jet acrobatics are as dazzling as their plumage, and theyre the only birds that can fly sideways and backwards. But the same physics that sets them apart also exacts a hefty price.
As the world's smallest birds, hummingbirds have a high surface-area-to-volume ratio. That means they lose a lot of heat through their skin (the same way, for example, small ice cubes melt faster than big ones). The problem is compounded by a lack of downy feathers, the fluffy insulation that keeps most birds warm. Skipping the down shaves weight, but the birds must compensate by refueling constantly, consuming two or three times their body weight every day.
That's why hummingbirds love nectarenergetically speaking, it's like rocket fuel. They will visit multiple flowers in a minute, lapping up three to seven calories daily. That may seem like a trivial amount, but when scaled to the size of a human, it translates to about 155,000 calories a day. (If the birds were any smaller, it would be physically impossible for them to eat enough to stay alive.) As a result, hummingbirds are territorial. They stake out flowers and feeders, defending a food source at all costseven at the cost of having a social life.
Unlike many other birds, hummers dont hang around in flocks (except when they concentrate near food); males and females dont even raise their families together. Mating takes about half a second, after which the female zooms off to build a nest, lay eggs, incubate them, and raise the chicks by herself. The only exception to this rule occurs in the tropics, where several species of hummingbirds display at leksplaces where males get together to vocalize and show off for females. But even lek mates dont end up sticking it out for long periods of time.
FULL story at link.
InfoView thread info, including edit history
TrashPut this thread in your Trash Can (My DU » Trash Can)
BookmarkAdd this thread to your Bookmarks (My DU » Bookmarks)
2 replies, 1694 views
ShareGet links to this post and/or share on social media
AlertAlert this post for a rule violation
PowersThere are no powers you can use on this post
EditCannot edit other people's posts
ReplyReply to this post
EditCannot edit other people's posts
Rec (1)
ReplyReply to this post
2 replies
= new reply since forum marked as read
Highlight:
NoneDon't highlight anything
5 newestHighlight 5 most recent replies
Audubon: Where Do Hummingbirds Get All That Energy? (Original Post)
Omaha Steve
May 2016
OP
elleng
(131,348 posts)1. I saw one yesterday too,
at my window; couldn't tell what type, color appeared grey. AMAZING!
hollysmom
(5,946 posts)2. heh when I saw this I immediately thought of little kids on sugar.
turns out to be right.