When do Humming birds come back?
442150
It depends on where you live.  Here in SE Michigan, we start seeing them in early May.  I always put my hummingbird feeder out on May 1 in case any come back early, especially if it is a mild spring.
299514
I dont know when they are coming back, but i hope they hurry up!!! i love those things.
748862
The Ring-Billed Gull is a medium-sized gull that is often called the "sea gull." This bird used to be quite abundant, and was called the Common American Gull. It was killed for its feathers (mostly used in hats), but has now recovered from a drastic decline in population numbers; it may be the most abundant gull in North America. This sea bird is found along ocean and lake coasts of North America. The life span is about 10 to 15 years. These water birds make a high-pitched squawking sound and a ky-eow sound.
165152
Ravens, birds that formerly populated mountainous regions, are ubiquitous in the desert. Their numbers have increased throughout the region by more than 1,000 percent over the past 30 years.\n\nI couldn't find a link with the population but quite a bit of info. I hope this is helpful. Thanks for the recipe.
960140
Here is a bunch of links, responding to all of your questions:\nhttp://www.closertonature.com/outdoors/bird-migration.htm
150113
Most hummingbird's feet and legs are so small that they cannot walk or even hop; hummingbirds mostly use their legs and feet for perching (but the toes and claws are very long, and are used for perching). Hummingbirds are almost helpless on the ground.
909972
How do you know they are looking for nesting sites?? Maybe they are just looking to roost or feed.  A few birds will build nests to sleep in, but most just build to breed in. The weather will trick birds sometimes and weather that is too warm due to things like global warming may confuse them.  Some birds such as the Anna's hummingbird will start nesting as early as December. Some hawks will also start to pair up early for the spring.
1172023
How many times does a hummingbirds heart beat per minute?
451614
Yes, we do have lovely songbirds here but bird feeders are readily available already so you need to think of some sort of characteristic that your bird feeder has that the ones that we have do not have. You need a selling point.\n\nYour selling point should not be protection against squirrels because we don't have the American gray squirrel. The little red ones that we have don't live near people, they are very shy and do not attack bird feeders.\n\nMaybe they are easier to load, or hold more seeds without spoilage or maybe your feeder has a design that prevents wastage of seed falling to the ground. I haven't seen your feeder so I don't know how to sell it.\n\nYou can see the kind of feeders that we use on the web site of the LPO (League pour la Protection des Oiseaux).\n\nIf you can send me a picture of your feeder, maybe I can think of some more ideas.\n\n\nOh, yes, Thank you, Mr. Curious for your helpful comments.
1160119
Nope.  As the proportions of the hummingbird gets bigger their weight, which is proportional to volume, also gets bigger.  Strength on the other hand is known to be roughly proportional to the cross section of muscle for any particular limb.  The same calculations are used for weight lifting events, and tell us if a 200 lb athlete did a better lift than a 180 lber.  I\n\nIn addition to all that, the bones also do not increase in nearly as much volume proportionatly as the meat.  The hummingbird would snap its bones trying to flap them that fast, but it probably wouldn't even be able to fly at all.  Because of all these limits on our structures, any animal that big begins taking on the weightlifter build.  For birds, the limit is that of the condor and it glides everywhere it goes.  The albatross is so fat at 30 lbs it already has trouble taking off and landing, so much so that its nickname is the goony bird.  30 lbs :that's the upper limit for birds on Earth right now.   \n\nThe teratorn is the largest bird that's ever been found at 160 - 170 lbs with a 25 foot wingspan and 11 feet from beak to tail, and it's EXTINCT.  We've only found the bones of one located in Argentina.  It seems hard to believe that a bird of that size would even be able to get off the ground, but it all the bones for flight so it must have.  This teratorn was a gliding bird of prey that closely resembled the eagle.  Animals like this and the Ultrasaur show us how what we perceive to be gravity is capable of changing... but that's for another question.
569758
Did you know that out of all the hummingbirds in the world, only one, the ruby throated hummingbird, nests and breeds and travels in the part of the south where I live? And did you know that I just found out that the shrub in my backyard that I have fought for 5 years to keep alive is a sweet shrub, also know as bubby bush or carolina allspice, and is possibly on an endangered species list?  (when you're bored, learn something!)
796385
You Gotta Be Kidding Me Buddy...\n\nWinter is not an easy time for birds. Not all of them are genetically programmed to head south for the duration. Imagine if you had to stay outside in freezing weather the entire winter! A bird-friendly habitat may make the difference to their survival.\n\nThe birds that visit your neighborhood vary with the seasons-not only the species, but also the individuals. Some species, such as downy woodpeckers, may be year-round residents. Others-dark-eyed juncos and ruddy ducks for example, are winter visitors. You will see hummingbirds only from late spring until early fall. Species such as rose-breasted grosbeaks may visit only during spring and fall migration. Robins may migrate only a few miles, and return temporarily if the weather becomes milder.\n\nMany birds flock together for survival in the winter. The ones that seem to be most noticeable are starlings and crows. Starlings may gather by the thousands. Once they have flocked, breaking up the flock may mean death to many of its members. Practice and teach tolerance. The most effective way to prevent flocking is to change the habitat, but this should be done in the warm season.\n\nglycerin and antifreeze will kill birds!!!
801824
Typically birds fly to the southern most part of their range.  Depending on species it can be a slightly different direction.  Many species migrate: waterfowl, songbirds, hummingbirds, etc.  Many birds do not migrate....mostly birds found in areas where is does not get very cold (California, Florida, S. America etc.) and where there is food available year round.
846727
Just look anywhere in the sky. I saw one about an hour ago, but that was after an hour of looking. Normally you can't see them until after midnight, but unfortunately the predicted swarm only lasts about an hour and will end before midnight in the US. Europe should get a good view though.
84746
Not around here they aren't. I haven't heard any evidence to say they are, but it is possible. Not very likely however. I would say it is more likely that they are disapearing from a specific place, such as around you, because of changes in the climate, introducion of a new species that is competeing with or eating the bees, or something like that.
26675
Once they've found food, they'll keep coming back. Make sure they can't get into your trash, etc. and they might go away but it's doubtful. You either have to trap them and move them somewhere else or kill them (I hate to say that). We've had the same issue at our lake property. They come and raid our bird feeders at night. The full time residents down there eventually kill them instead of trapping and moving them.
27624
go to http://www.birds.cornell.edu/programs/AllAboutBirds/BirdGuide/