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For more, visit the Crocodile Research Report Web Page Here is a taste of what's there.
IntroductionCrocodilians are possibly the most feared order on Earth!Ê Crocodilians are amazingly successful animals in their natural environment. They have an ancient complex evolutionary history, dating back to the times of the dinosaurs. There is much to be learned from this highly evolved, immensely wonderful order of reptiles. However, time may be running out because of the critical state of many of today's species.
How do you conserve an animal that most people fear and have little love for? This has been a major question and problem for the conservation of crocodilians worldwide. This problem is especially prevalent in the conservation-orientated country of Costa Rica.
Evolutionary HistoryThe evolutionary history of the crocodilians and their relationship to other animals is highly unclear, although there has been extensive work on this subject. Traditionally, the relationship between species is determined by "Linnean ranks", which is based on shared characteristics (Britton 2002). For instance, crocodilians and lizards have many similar characteristics and are hence closely related. This may not be the most accurate way to examine evolutionary relationships of species; therefore a less subjective alternative rank system is increasingly used called the phylogenetic taxonomy.
There is confusion as to where the crocodilians evolutionary fit among the reptilians. They are in the class Reptilia, a group that excludes birds, even though it is generally understood crocodilians are more closely related to birds than snakes, lizards, or turtles (Naish 2001 and Britton 2002). Although birds belong to the class Aves (not Reptilia), they are placed in the subgroup Archosauria with the crocodilians. A recent molecular phylogeny study by Hedges and Poling (1999) shows that crocodilians may be more closely related to turtles than birds, although morphological and paleontological evidence is unclear.
For more, visit the Crocodile Research Report Web Page This is just a taste of what's there
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