Some male birds would disagree on at least one count.
Successful territory establishment and defense by means of aggressive interactions are essential for reproductive success in this colonial breeder.
Meiosis II is also unequal and results in the formation of a second polar body and a haploid ovum ootid.
"Do female red-winged blackbirds benefit genetically from seeking extra-pair copulations? The myometrium exhibits strong contraction during delivery of the baby.
Maternal secretion of antibodies and absorption by the young occur only prenatally in birds with the exception of pigeon crop milk From: Boulinier and Staszewski 2008.
Evidence exists that illustrates the ability of genetically similar spermatozoa to cooperate so as to ensure the survival of their counterparts thereby ensuring the implementation of their genotypes towards fertilization.