You can read all of the observations people have submitted here. Some of this week's highlights:

Males Still Seen in the North
While many males have long gone south, some are lingering as far north as Canada.

"Resident ruby-throated male has not yet left. He is still dive-bombing juveniles and travelers. We have seen many come through in the the past several days. We will miss the mighty warriors!" declares Tommy from Park Forest, IL.

Who Knew Such Little Birds Could Drink So Much?

"Ruby males and females, counted over 35 at one time. Feeding is consist ant from about 7:30 am until 8 PM. Have 15 feeders set up on habitat property. Cleaned and filled them full with homemade solution early this morning. By 8 PM tonight, all but one feeder was empty! (No leaks either!) Who knew such little birds could drink so much! So many birds swarming the feeders and the trumpet vines on the property! This is the first year of the last 8 years that the migrating hummers have been so abundant. Enjoying them while I can....and spending my money on sugar!" writes Karee from Des Moines, IA.

Coming by the Dozens

"The ruby red throats are coming in by the dozens. They are enjoying the feeders and flowers from dusk til dawn," reports Sharon from Cuero, TX.

"I can only estimate 30-40 maybe even 50 hummers and they seem to be evenly split between male and female with lots of juveniles too," reports Scott in Huntsville, TX. "All 5 feeders are busy all day."

Passing Through

"Numbers are dwindling (4 Black-chin, 2 Calliope, 1 Rufous), but I picked up an Anna's on 08/29, which continues to visit our feeders," reports Fred from ID.

"The broadtails and black-chinned have left and we are having the rubythroats now. There are also 4 females and 4 males, writes Janet of Goldthwaite TX.

"I need a better look at the tail," wrote a Pennsylvania observer, uncertain whether she saw a male or a female.

"Not sure if it was a juvie or a female," wondered Carol of Haliburton, Ontario. How could she tell them apart?

What clues help us identify the hummingbirds we see? This week, discover some field markings that are clues:

• Male or Female? Adult or Juvenile? Field Markings of Ruby-throated Hummingbirds
• Photo Gallery