Evelyn Cooper
07-05-2009, 07:43 AM
http://i281.photobucket.com/albums/kk212/EvelynCooper/SmallBluebirdEgg038.jpg
I found these abnormal size Bluebird eggs on my trail Friday. I wrote Keith Kridler, expert bluebirder, Mt. Pleasant, TX and what he wrote me is below. The egg on the left is larger than the normal bluebird egg on the right. He told me it is a double-yoked egg. He also reminded me that a while back a double-yoked Barn Swallow egg hatched and the babies were conjoined. They tried to fledge, but did not survive.
Keith Kridler writes:
"These are called dwarf eggs and normally they won't have a normal sized yolk in them. There will be the normal amount of egg white but not enough yolk so the egg will be smaller. In this photo there is a double yolk bluebird egg and then the next day there was not a yolk in the oviduct so you had the dwarf egg in the same nest." Keith Kridler
I was amazed to find the tiny Bluebird egg and to observe the larger egg which I am sure is double-yoked.
I don't have much hope these eggs will hatch as we've had temps up to 102* and they cannot make it.
I had one baby hatch in the yard that the eggs went through that high temps and it died on day three. It never was right.
Evelyn
Delhi, LA
I found these abnormal size Bluebird eggs on my trail Friday. I wrote Keith Kridler, expert bluebirder, Mt. Pleasant, TX and what he wrote me is below. The egg on the left is larger than the normal bluebird egg on the right. He told me it is a double-yoked egg. He also reminded me that a while back a double-yoked Barn Swallow egg hatched and the babies were conjoined. They tried to fledge, but did not survive.
Keith Kridler writes:
"These are called dwarf eggs and normally they won't have a normal sized yolk in them. There will be the normal amount of egg white but not enough yolk so the egg will be smaller. In this photo there is a double yolk bluebird egg and then the next day there was not a yolk in the oviduct so you had the dwarf egg in the same nest." Keith Kridler
I was amazed to find the tiny Bluebird egg and to observe the larger egg which I am sure is double-yoked.
I don't have much hope these eggs will hatch as we've had temps up to 102* and they cannot make it.
I had one baby hatch in the yard that the eggs went through that high temps and it died on day three. It never was right.
Evelyn
Delhi, LA