BACKGROUND Talon cusp is a supernumerary structure projecting from the dento-enamel junction to a variable distance towards the incisal edge of an anterior tooth. Studies have shown that it consists of enamel, dentine and a variable amount of pulp tissue. Hyperactivity of the enamel organ during morphodifferentiation has been attributed to its formation. Most previous reports have been made con...

Competition among species with similar ecological requirements may preclude species coexistence. However, species with similar requirements may coexist under determinate environmental conditions. Major effort is being dedicated to conserve the golden eagle (Aquila chrysaetos) and Bonelli’s eagle (Hieraaetus fasciatus) in Spain, two raptors with similar ecological requirements. This work analyse...

Diagnostic records of 227 bald eagles (Haliaeetus leucocephalus) and 78 golden eagles (Aquila chrysaetos) collected in Saskatchewan, during 1992 to 2012, were reviewed to identify common causes of mortality. The most frequent cause of death in bald eagles was toxicosis (53%), followed by trauma (22%), electrocution (6%), infectious disease (4%), malnutrition (3%), and idiopathic disease (2%). T...

The talon cusp is a relatively rare dental developmental anomaly characterized by cusp-like projections, usually observed on the lingual surface of the affected tooth. Normal enamel covers the cusp and fuses with the lingual aspect of the tooth. The cusp may or may not contain an extension of the pulp. The condition can occur in both the primary and permanent dentitions. However, the occurrence...

Despite the bounty resulting in the removal of more than 100,000 Bald Eagles from the Alaskan population during the first half of the twentieth century, Bald Eagles can be considered secure and even at saturation levels in Alaska. This is undoubtedly due to the maintenance of undisturbed, suitable habitat and an abundant food supply. Similarly, much of Canada boasts abundant Bald Eagle populati...

Talon cusp occurs as a result of disturbances during the morpho-differentiation stage of tooth development. It is more common on the palatal surface of the permanent maxillary incisors. It can be unilateral/bilateral, but can also occur on the same tooth. Only 2 published reports exist documenting talons on both labial and lingual surfaces of the same tooth in permanent incisors. The purpose of...

Potential wind-energy development in the eastern Rocky Mountain foothills of British Columbia, Canada, raises concerns due to its overlap with a golden eagle (Aquila chrysaetos) migration corridor. The Dokie 1 Wind Energy Project is the first development in this area and stands as a model for other projects in the area because of regional consistency in topographic orientation and weather patte...